Hk ump bolt. Factory HK barrel. The USC/UMP45 conversion feels exactly like the issued UMP45 I shot in Afghanistan. 9mm HK barrel preferred {TN barrel will work} 9mm HK bolt (Complete) - as long as the bolt is complete you need no other parts. Compatible With: HK UMP . HDPS UMP barrels are perfect for the USC to UMP conversions and for a replacement UMP . 45. 87″ Threaded M16x1 LH Stainless Steel with Cerakote finish Barrel for Hk UMP and USC (Compliance Part) $ 365. Dec 9, 2014 · Who can mill a UMP . May 14, 2018 · The USC/UMP retains every bit of the supreme reliability the UMP is well known for. Firing Pin. This barrel is the same length as a factory HK UMP barrel only it is threaded . Used German bolt carrier complete that is tungsten filled and the factory correct HK UMP . HKP HK MR556/416 Upper 8" 416C Style Conversion Kit. It was developed in the 1990's by Heckler & Koch to replace the MP5 on the production line. Sale. #3 · Jan 2, 2010. 00 HK UMP lower, Navy model which had been converted to semi-auto by Mr. I would offer the bolt and spring system of the UMP were designed against a range of pressures for each caliber. A truly modern submachine gun, the UMP is made using the latest in advanced polymers and high-tech materials. 56 / . When doing a UMP conversion, you can attach a UMP skeleton folding stock by either having a demilled UMP rear section fused onto the USC (as part of the conversion - there is cutting and plastic welding involved) ), or adding an HDPS stock block B. 000000. 578 X 28 with an overall factory-correct length of: 7. This is the only UMP 9mm kit available that was built to factory specifications with 16 flute-chambered barrels and tungsten-filled carriers for both semi and full. Previous. #3 · Feb 14, 2019 (Edited) Both USC and UMP bolts have an "auto trip" which is the firing pin retaining pin that sticks out of the left side of the bolt. Some in the left / middle There are hk 45 auto with no markings at all. bolt and barrel modified/re-chambered to 10mm. If someone knows more than me on this let me know if I am wrong here. This UMP conversion kit provides the necessary components to convert . This is a required part for the USC-UMP Conversion using the (stock block B). 99 In Stock GSC Mailing List. Parts kit/used, HK factory original, complete full-auto bolt group for the HK G36 rifle. $3. Full auto bolt carrier (works in semi and F/A) Recoil assembly. 00 (used parts) 40 Caliber bolt needed to be converted from UMP spec to be able to be used in this semi-auto Gideon receiver - $95. 578 x 28 standard thread, with thread protector. The HK UMP is available in 9x19mm a9x19mm as a complete weapon. 7 Bolt Group, disassembled The bolt group (Fig. HKP-18629. It can also be used on B&T firearm and stock applications for a 1" longer length of pull. Even though the MP5 is one of the most appreciated sub machine gun designs, it was lacking in two areas: production cost is high and ability to accessorize is lacking in some areas. H&K HK MR556/MR762/416/417 Bolt Catch Spring Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name GSG9 HK G36, HK G36K, HK G36C Full Auto Tungsten Filled Bolt Carrier - Black. The UMP is a magazine-fed, blowback-operated submachine gun that fires from a closed bolt. 95. from: $69900$49900. $400. Add NFA engraving. Jump to Latest Follow May 2, 2017 · The conversion of a HK USC carbine is broken down into three main areas of work: Fitting a stock to the stock block adaptor, the upper receiver work, and the lower receiver work. This part is easy to swap out by just knocking out the roll pin, replacing it, and then re-inserting the roll pin. This listing is for a complete factory German Heckler & Koch HK UMP bolt carrier group in . All UMP folding stocks come with an HK date code. 45 Factory Full Auto Bolt Group Complete Used. (Photo: HK) H&K UMP/USC (. It utilizes a 25-round straight polymer magazine, folding buttstock, bolt catch and fully ambidextrous controls as HK UMP 9mm - Semi-Auto Bolt Stripped. recoil spring assembly, complete 3. With our new flat trigger you will improve the aesthetics of your firearm and will also give shooters a lower position on the trigger, which will increase leverage for a smoother, more consistent pull. All barrels are compatible with USC bolt/carrier and UMP bolt/carrier and are drop-in replacements for your HK USC or UMP conversions (NFA HK UMP-45 Barrel - . I believe all of the . Oct 3, 2012 · I have the opportunity to purchase a converted HK USC to UMP SBR in . 00; UMP HDPS 7. Recently bought an omega shadow ump 40 off gunbroker in “like new” condition. It’s unfailingly reliable, and accurate. 40 S&W/. HK UMP-45 Bolt Carrier Group - . 40S&W, and . More results: 1 2 3 Next Page View All. 9mm HK UMP Mag. Each bolt group comes complete, assembled ready to go: Bolt head complete. in the U. 45 UMP Barrel. With the UMP9, the bolt locks back, and the mag is easily swapped. HK claims the UMP45 has a minimum service life of 100,000 rounds. Features include the rear hinge weld on service, stock catch, UMP model name re-mark, folding stock, vent slot machining and 4 piece picatinny rail set. Dec 30, 2013 · I am fan of the Quick Detach slings vs the HK style of sling mounts. Includes: Extractor. Full auto parts kit. Add to Wish List. The UMP is available as a semi-automatic or fully automatic submachine gun. What are peoples thoughts on this weapon and also on the price given. #20 · May 13, 2010. 4 posts · Joined 2019. 45/. New HK German Factory USC/UMP Front Sight. HKP - HK UMP, USC - Flat Trigger. HDPS Barrel Advantages: All barrels are compatible with USC bolt/carrier and UMP bolt/carrier 217572. Specifications: Marked . 45 for around $2500ish. HK UMP . Have an Omega Gideon Shadow in . Prevents a wrap-around style pistol grip. Midwest Gun Works offers a wide range of parts and accessories for the HK UMP, a versatile submachine gun that can be converted to different calibers. 40 caliber. Upgrade with HK USC Handguards and HK UMP Triggers, and experience the difference in quality and craftsmanship. Unlike the SL8, the stock block conversions don't add much length to the rear of the USC, so you don't have the big LOP problems that you do with the SL8. compliance part) $ 350. Its first versions, the Heckler & Koch UMP45 and UMP40, were chambered for . When the gun fires, the barrel and bolt are locked together until gas causes the bolt to rotate and unlock. 45 ACP by an be converted from 9x19mm, . A USC or Omega receiver won't let an UMP bolt be installed unmodified, but that has nothing to do with the trip. 40 cal and 9mm UMP conversions use a milled down full auto UMP bolt since HK doesn't make a USC-type semi bolt in those calibers. New UMP folding stock. This HK bolt carrier group is complete with a firing pin and extractor assembly. MM’s UMP Tungsten filled UMP . This tool is one of the best items you can buy if you are new to HK and plan on taking apart your bolt group for cleaning or maintenance. extractor 6. First off I’ve searched the thread and couldn’t find what I’m looking for so I joined the forum to ask. 45ACP and could reach a rate of fire around 500-600 rounds per minute in full giggitty mode. Metal inserts provide the strength and durability needed in the pressure bearing components of these weapons and provide the guiding surfaces for the bolt. Your Price: $729. 40 S&W. usc bolt vs ump bolt. Do they make a QD option for the Stock Block Bolt rather than the HK mount that comes with the UMP? The conversion parts are drop-in with the total swapover of parts taking about 5 mins. This allows you to build your UMP Kit into a recoil operated, closed bolt, lightweight, durable and easy to maintain semi auto pistol. The semi-auto bolt is required for HK USC to HK UMP caliber conversions. 308) Bolt Carrier Assembly & Disassembly Tool Apr 1, 2018 · Help me diagnose my UMP clone (Omega Gideon) issue. ----Spare parts I would recommend. Add UMP demilled rear section (must be four inches long) and refinish the receiver. Milling of the forward receiver hooks on the HK German USC, UMP Bolt Catch Pin HKP-16517 Out Of Stock. You might be thinking of MKE MP5 style New. In either case you end up getting the hinges to attach HK UMP & USC Bolt Catch For Last Round Hold Open Bolt Catch for HK UMP & USC Lower - USA HK USC 45 Auto (ACP) 16. Please select the bolt carrier type that you need for your conversion. S. $99. Matched with a simple and ultra-reliable blowback operating system, the HK USC is a radical departure from traditional firearms designs. 40 to . HK UMP/USC (9mm) Semi Auto Bolt Carrier. Mar 5, 2014 · Actually created in 1999 (the original posts from the first database were lost), we are a forum dedicated to and laser-focused on Heckler & Koch firearms, Heckler & Koch accessories and the owners and enthusiasts that love them! Come join the discussion regarding HK pistols, long arms, NFA arms, HK accessories, HK history and trivia and more. Each bolt group will work and fit on semi or full auto MP5 9mm style firearms. The USC uses a single stacked 10 round mag and has a fixed stock held on by screws. HK UMP 10mm Conversion Kit Bolt and Barrel. The UMP bolt face is also different and will not work with a USC BBL. HDPS UMP block & Stock pin. H&K UMP/USC (. 45 ACP. Compatible with all models of USC and UMP's. Derived from the HK UMP submachine gun, the USC is a civilian utility carbine that uses the classic hard-hitting . It comes with notch and post style sights, and a 25 round magazine. CONVERSION PARTS LIST. I have a USC & UMP. 00; HK USC . I have a TN block and their stock, and have no issues with it, but a lot of people look down on TN Oct 16, 2017 · The newly released Omega Gideon Shadow (GS) Receiver. The optional equipment portfolio ranges from the classic skeleton buttstock to the use of tactical helmet buttstock variants. 8″ OAL, . In Stock. A must-have for all HK collectors and shooters. Later, a Heckler & Koch UMP9 version became available, chambered for 9×19 mm Parabellum ammunition. 62x51 / . Jun 17, 2013 · Pre-apologies if you know most of this. The UMP offers maximum safety and accuracy as it fires from the closed bolt position. Machined bolt carriers are available for USC/UMP conversion sub-guns. $1,029. Firing pin spring. Decrease Quantity of H&K HK MR556/416 Bolt Catch Increase Quantity of H&K HK MR556/416 Bolt Catch. Fig. #1 · Oct 20, 2022. $1,285. Now that I’ve got these parts I’ll start to document what you need to do to the bolt to assemble this thing as well as updating this when my 16” Barrel arrives and how the gunfunctions/looks ect. Stress relieved & Air gaged to +/- . 6 and 7) consists of: 1. The UMP is a modern sub machine gun of German origin. 87 inches. 40 Cal. HKP-20766. firing pin retaining pin 2. 45 cal. . The longitudinally movable guide ring supports itself within the bolt. As this donor USC was one of the earlier gray models, there is also a section on how to dye the polymer parts black. See options/selections. Thread protector not included however they are available below. 40 S&W has better stopping power but slightly less efficiency at longer ranges. HK Bolt Carrier Bolt Locking Lever Axle Pin - G3, 91, PTR & HK93, 33, 53Brand new HK German bolt locking lever axle pin or cylinder pin for HK locking levers for the following bolt carriers: G3, 91, PTR HK 93, 33, 53 HK21, 23, 11, 13 PSG1, MSG90 Login. 223) & (7. 45 ACP/9mm) Folding Stock. USC semiauto feed ramp, will not work with UMP bolt. This is a simple drop-in conversion for those that have already done the USC HDPS UMP Flanged barrel 7. Length: 7. 40 S&W, or . I brought in some of the first HK UMP . 2. The weapon's closed bolt improves accuracy, but its simple blowback mechanism makes it more difficult to control than the MP5. I am told it is all HK parts and comes with 6 HK magazines. Description. Some of the UMP controls echo those of the MP5. bolt 5. Includes Extractor USA. I am looking at doing a USC conversion and had a question in regards to the bolt carrier group. Replacement part for USC to UMP conversions. Simple yet highly capable, the UMP45 includes many of the same characteristics found on the UMP40 and UMP9 models. 87" UMP German polygonal barrel with flange. HK USC 45 cut down and threaded, factory HK barrel. Marked . 45 Auto just like the OEM carrier USA. $699. Brand new German HK folding stock. HK USC-UMP conversions. 0002″. HK Bolt Carrier Assembly & Disassembly Tool. HK USC/UMP 9mm Extractor. HK UMP-40 Bolt Carrier Group - . Nov 18, 2017 · Package of used demil kit HK made UMP 40 caliber bolt, barrel, and three new mags - $575. Mar 6, 2020 · The UMP was designed as a thoroughly modern gun with polymer upper and lower assemblies and a blocky, easy-to-machine bolt. H&K UMP (. Parts kit included a lower and bolt that were reportedly converted by Tom Bostic, mags are HK LE Only marked, and the barrel (I believe, never confirmed with the H&K UMP/USC (. SKU: G36FABLT-1Categories: Services HK SL8 to G36, UMP G36Tags: G36, G36C, G36E, G36k, SL8Product ID: 5939. Add the stock hold open ledge. HK UMP & USC HKP-00785. All parts use ordnance grade steel . A compact, lightweight submachine gun, the 4. 45 ACP/9mm) Front Sight. They are considered by many to be the finest US-made barrel available. 45 Bolt carrier USA. from: $59900. It does retain the closed bolt operation of the MP5, providing much improved single-shot and first-shot accuracy compared to most SMGs. Subscribe Unsubscribe Safe and Secure Checkout Aug 18, 2015 · Throughout the years I have owned the HK 93, SP89 and HK 94 along with all the more modern rifles and handguns (MK 23, USP’s, P7M13, etc. The caliber conversions are the main reason people use a UMP bolt in a USC. 45 Cal; CHF; Polygonal rifling; 8″ length. Will work with UMP machineguns or with semi auto conversions ( USC, Omega, etc…. 40/9mm all use the same recoil rod BTW) and some extra barrel pins. 7. HK MP5 Parts Kit - Modified for Training Use Only - Blank Fire. Convert the UMP lower, including opening the hooks, filling the catch block, per ATF spec, and converting the fire control group or swapping in the USC controls. HK UMP lower. 40 bolt to work in a USC receiver and how much would it cost? Thanks. 45 cal ORIGINAL GERMAN HK 16″ barrel $ 495. Will work with UMP machineguns or with semi auto conversions ( USC, Omega, etc… ) with additional bolt machining. Fast to the target, fast in transition, natural and intuitive. Its weight alone represents a substantial amount of the overall weight of the weapon. Aug 11, 2013 · New here to HKs. $75. 45 US Mag with steel feed lips. Finally, in 2001, I purchased a registered machine gun. 40 that was built off a stripped receiver and a parts kit I bought from a member on this site. The semi auto bolt group is required for HK USC to HK UMP caliber conversions. 45 ACP/9mm) Hammer Spring - Right. GSG9. Great condition. Feb 14, 2019 · rmk629. Apr 25, 2023 · I don't believe HK or any gun design engineers design their operating system around a specific round (yes, I know some of this is done with mil sniper rifles). b support The UMP machinegun parts were refurbished and reused to build this all HK parts, semi-auto version of the HK UMP. Additional Information. It has two fire modes, semi-auto and full automatic. The finest aftermarket Semi - Auto Bolt you can buy Apr 21, 2008 · UMP bolt does not fit in USC reciever we all know, but where do you have to mill to have it fit in the USC reciver? UMP Folding Buttstock - GSG9. Featureless Kydex grip wrap for use with detachable magazines. The HK UMP is available in hanging the barrel, bolt, and magazine. price $299. HKP-02285. 87 inches May 30, 2015 · The AR15 bolt and carrier are a very different design. 99 $629. 45s for my police department SWAT team. This is a common wear or breakage part. firing pin spring 6. 45 bolt carrier complete Heat treated , Parkarized and Polished for the best look and function possible, as an added bonus it now includes German HK internals which makes it a more reliable bolt group, guaranteed to last! A perfect drop in bolt group for the USC to UMP conversion, Gideon Shadow and the TMP. May 8, 2010 · 1430 posts · Joined 2001. Nov 23, 2014 · Often misquoted as a bolt carrier, like any the other HK designs, with the UMP, there is only one large bolt, affectionately nicknamed the BAB or Big Ass Bolt. 45 cal bolt group. HK UMP or SBR USC Threaded M16X1 LH. Also, our USC barrels have the same design of the UMP barrel by the chamber face allowing : All barrels are compatible with USC bolt/carrier AND UMP bolt/carrier!! Dec 12, 2011 · The main reason is to make it as UMP like as possible, so it's a matter of personal taste. 45 sub-guns to . Allows the use of the factory magazine release and detachable magazines over 10rds. bolt and barrel. receiver. Aug 8, 2022 · The Heckler & Koch UMP is a blowback-operated, selective fire weapon, fired from a closed bolt. Aug 26, 2020 · In order to reload, you typically lock the bolt back manually, drop the empty mag, throw in a new mag, then slap the charging handle. The UMP was previously available in s a complete Jan 2, 2010 · 4552 posts · Joined 2006. The controls mirror what many of us are more accustomed to on our AR-15s. 00 (new parts) Feb 1, 1999 · The excellent HK G36 rifle and the new UMP45 both employ polymers throughout to include the receiver and many internal parts. HKP HK UMP (9mm) Conversion Kit - 3 Lug - Threaded Barrel 1/2 x 28. This is a simple, drop-in conversion requiring a quick 5 minutes to complete. As a bonus, this item counts as 1 of the 3 needed US 922r compliant parts for a USC-UMP conversion. The UMP bolt underside length is taller than USC, preventing it from going in a USC. HKP MP5F & MP5 40,10 Recoil Rod Guide Ring For Recoil Rod Assemblies - Enhanced. Quick view. The UMP is easily disassembled into its main assembly groups for cleaning and care without the use of tools. Preban hi-capacity magazines can magazines can be used when featureless. 45 ACP/9mm) Bolt Catch Spring Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Required Base USC to UMP Conversion Service (Stock Block Type) THIS SERVICE INCLUDES: Milling the forward barrel cooling vents in the USC receiver to match the venting of the UMP. a guide ring 4. 9 pound UMP45 is being offered for sale by HK Defense Inc. $0. Includes Firing pin Retaining Pin USA. HKP HK 91/93/33/53/G3 (5. HK UMP 9mm Parts Kit - Like New Condition Front Sight 9mm Bolt Group Complete 9mm Ejector Lever Folding Stock 0,1,F Lower Trigger Group 1 x 30 round 9mm Factory Magazine 8 Inch - 9mm Barrel Barrel Retaining Pin Cocking Tube Support Rear Push Pin ** HDPS HK UMP 45 ACP 8 Inch Barrel - Flanged. The AR bolt locks to the chamber by lugs on the bolt engaging a extension on the barrel. Take off barrel in like new condition. 6 Bolt Group, assembled Fig. HK UMP STOCK. Firing pin. 45 ACP cartridge. The semi-auto bolt group is needed for HK USC to HK UMP caliber conversions. HKP-17835. Here are some examples Aug 30, 2007 · HK 8” UMP 9mm Barrel, 9mm Magazine, 9mm Bolt Group (. These kits can convert your semi auto HK UMP or Gideon 9mm or . $19. HK Parts . 45 ACP and . Dying of the gray polymer, USC to the dark black HK color. SKU: UMP40BLBCG-1Category: hide-from-searchTags: UMP, UMP 40, uscProduct ID: 8530. Firing Pin Retaining Pin. Milling the magazine well of the USC to accept the larger UMP magazine. $879. Sep 13, 2011 · HK LONG GUN TALK. Individual trigger group combinations can easily be realised due to the modular The USC is similar to the UMP but different enough to make the conversion more than just a bolt on affair. Out Of Stock. 99. 578 x 28 thread; Semi auto feed ramp; Trade-in/like new Jul 19, 2021 · A blowback weapon that fired from a closed bolt, the UMP was offered in 9mm, . On the UMP, the bolt isn't locked to the barrel. Features: Tungsten filled; Heat treated; Parkerized & polished; Marked 9X19mm just like the OEM HK bolt Throughout the years of the ump 45 bolt has there been any differences? Ones that say 45 AUTO In appareance seems some have the 2 letter date code on the far left of the face. 87. 40 SW ammunition respectively. Comes less the recoil assembly. $549. Having used a UMP for years and completing an HK’s Instructor Course with one, I’m pretty familiar with the SMG and jumped at the chance to get to use one again. $40. Firing Pin Spring. Do you even HK, Bro? Like. 00 Introduction. firing pin assembly 6. Oct 20, 2022 · 7 posts · Joined 2022. 40 barrel. Parts are from police trade-in kit and have H&K date coding and nitro crest marks. Getting the gun the bolt and barrel looked like it’s been shot, rest of it not a scratch on it. HKP-19030. $999. 40 Caliber Conversion Kit Includes: UMP . 40. Apr 1, 2015 · The UMP45 is a select fire sub-machine chambered in . Quantity: Add to Wish List. 45 ACP by cchanging the barrel, bolt, and magazine. Available in … Read More The HK UMP is freely configurable with regard to its features. Tom Bostic - $325. $359. 5in Black Semi Automatic Modern Sporting Rifle - 10+1 Rounds - Derived from the HK UMP submachine gun, the USC is a civilian utility carbine that uses the classic hard-hitting . 87″ for Heckler and Koch UMP and USC Stainless Steel with Cerakote finish(U. Omega HK UMP . I just want to confirm that a USC bolt will work with a USC and UMP barrel but a UMP bolt carrier only works with a UMP barrel. H&K Heckler & Koch $0. 40 and . 45 ACP round, although at the end of the day you’re still firing a sub HK UMP Kits; Non-HK Parts Kits; Other Gear / Services . Solar Tactical HK UMP Kydex Grip Wrap - Black. 45 barrel. 45 Bolt Carrier Complete - Semi Auto. Trade-in/used parts, good condition; Factory HK cone flange; Full auto/machinegun feed ramp; CHF HDPS UMP barrels are perfect for the USC to UMP conversions and for a replacement UMP . It’s also a gunfighter’s gun. Choose from an expansive selection of HK UMP and USC parts, such as HK UMP Barrels and HK USC Stocks, crafted for those who value reliability and performance. 45 semi auto just like the OEM carrier. Factory HK UMP . The barrel is 8 inches long, which does actually maximize the ballistic effect of the . Specifications: Length: 7. ) that H&K offers. USC. HKP HK Parts. 45 ACP/9mm) Bolt Catch Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name ump - usc usp vp9 - vp40 - p30 1200 meter sight parts hk mp5 9mm ih date coded bolt head complete w/ firing pin, locking piece, spring. This gun started life as an HK 94 and was converted in Oklahoma to full auto with the three lug barrel, SEF lower and a collapsible Oct 9, 2012 · The UMP was also imported at almost half the cost of an MP5, with a similar reduction in wait times. 100 Degree locking piece. HKPRO is a forum community dedicated to Heckler and Koch enthusiasts. 45 respectively. Gatewood Supply Co is your Heckler & Koch HK UMP-9 HK UMP-40 UMP-45 rifle barrels, upper assemblies, triggers hider parts kits and accessories source. Can also be used on B&T firearm and stock applications for a 1" longer length of pull. If HK had designed another method of operation, the overall size might have been smaller, but simply holding the bolt in your hand should help you understand why the weapon needs to be so large. The UMP chambered in . UMP . Those barrels are made from blanks, turned on centers, machine finish. Mar 15, 2016 · HK VP9 TB HK UMP, SBR HK USPct HK P9s HK VP70, just because HK MP5 by FJ Vollmer & Fleming sear pack Vector SP89 SBR SW93, now a 53 SBR (brought back to life by Ghillie) PTR PDW-91, form1, ckh cashed 3/10/15, stamp approved 9/14/15, 6mo 4 days! HK MP5 SBR and FA Sear- chk cashed 8/9/13, stamp arrived 4/21/14, 8mo 13days! Jul 6, 2021 · I plan on converting it, and am trying to decide if getting a tungsten filled bolt carrier is worth it. Aug 18, 2014 · Of specific importance is the fact that the UMP utilizes simple direct blowback operation, which depends solely on the mass of the bolt for operation. Others the eagle hk proof marking are to the right. This is the finest US BCG available. Whether you need magazines, stocks, rails, barrels, or triggers, you can find high-quality products from Heckler and Koch and other reputable brands at Midwest Gun Works. Each receiver covers 3 of the most popular calibers in 9mm, . Aug 15, 2021 · H&K Heckler & Koch. HK UMP 9mm. The two main differences between bolts are the bolt face and the underside height. The full-auto bolt carrier will not work in HK USC rifles. The end user can simply swap the barrel, bolt and magazine and the end Mar 26, 2009 · Here is what you need for a 9mm USC/UMP conversion. HK Factory Original G36 Complete Full Auto Bolt Group. Each barrel is an exact reproduction with all HK German specs. The UMP cThe UMP can be converted from 9x19mm, . German HK UMP . 00. ez nz mb rk ru uv uj ia ai fj