Bolt Carrier Groups
Discover top-quality H&K bolt carrier groups at HKParts, including the HK MP5 bolt carrier, G3 bolt carrier, and HK93 bolt carrier. Explore our selection of full auto bolt carriers, enhanced bolt carriers, and tungsten-filled bolt carriers for models like the HK416, HK91, and HK MR556. Ensure reliability with factory HK bolt carriers and US-made bolt carriers. Shop now for chrome-lined bolt carriers, firing pin assemblies, and complete bolt heads to maintain 922r compliance and superior performance.
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PTR-32 (7.62x39) Locking Piece - 70 degree
PTR
$63.95PTR-32 (7.62x39) Locking Piece - 70 degree New PTR Locking Piece For PTR-32. Marked "70" for the PTR-32 series of rifles and pistols. This is a 70 degree locking piece. New PTR manufacture. This locking peice will also work for custom HK builds as well.HKP-18519$63.95 -
RCM 300 BLK Locking Piece
RCM
$49.95RCM 300 BLK Locking Piece New US manufactured 300 BLK locking piece for custom 300 builds or other custom 300 BLK HK style roller locked firearms. Compatible With: HK 93 & 33HKP-15547$49.95 -
Out Of Stock
GSG9 HK G36 (5.56/.223) Complete Bolt Head
GSG9
$0.00G36 Bolt Head - Complete - USA G36 Bolt Head allows the use of double stack magazines in your SL8 conversion to high capacity G36, Magpul or AR15 Magazines. Perfect for the G36 conversions or for a spare part to have on hand. Made in the USA from 9310,...HKP-18983$0.00 -
H&K G36/MP7 (4.6x30/5.56/.223) Firing Pin Bolt O-Ring
H&K Heckler & Koch
$9.95HK G36 & MP7 Firing Pin - Bolt O-Ring Compatible With: HK G36 HK MP7HKP-01858$9.95 -
H&K G36/SL8 (5.56/.223) Extractor Axle
H&K Heckler & Koch
$9.95HK G36 & SL8 Extractor Axle This part can become heavily worn and is prone to breakage. Compatible With: HK G36 models HK SL8 modelsHKP-01895$9.95 -
H&K HK MP5 9mm Complete Full Auto Bolt Group
H&K Heckler & Koch
$2,874.95H&K HK MP5 9mm Complete Full Auto Bolt Group This is a factory genuine HK German full auto bolt group compiled with the best German parts available for those that need the best parts on their beloved MP5. Last call on these as they are NLA and...HKP-21478$2,874.95 -
H&K HK MR762 Firing Pin Retaining Pin
H&K Heckler & Koch
$19.95H&K HK MR762 Firing Pin Retaining Pin Compatible With: HK MR762HKP-16612$19.95 -
H&K MP5 40/10 +2 Roller
H&K Heckler & Koch
$19.99MP5 40,10 +2 Roller New HK German MP5 40/10 +2 roller. Hard to find and essential for making headspace adjustments when necessary. Great spare to have on hand and no longer in production. Please Note: The price listed is per roller. Order 2 (pair)...HKP-00334$19.99 -
H&K MP5 40/10 +4 Roller
H&K Heckler & Koch
$20.95New HK German MP5 40/10 +4 roller Hard to find and essential for making headspace adjustments when necessary. Great spare to have on hand and no longer in production. Please Note: The price listed is per roller. Order 2 (pair) for a complete set...HKP-00335$20.95 -
H&K UMP (.40 S&W) Bolt Group - Used
H&K Heckler & Koch
$649.95German UMP .40 factory F/A Bolt Group - Complete This item is used in very good shape or better.HKP-00601$649.95 -
HKP MP5/K 40/10 Locking Piece - Extra Low Impulse
HKP HK Parts
$49.95HKP MP5/K 40/10 Locking Piece - Extra Low Impulse Marked 100 Degree For the MP5 40 or 10mm Firearms. Made out of enhanced material and heat-treated to spec. The #100 degree locking piece is an extra low impulse 40/10 locking piece. To be used with MP5 40...HKP-18273$49.95 -
RCM HK SP5K Semi Auto Carrier
RCM
$159.95RCM HK SP5K Semi Auto Carrier SP5K semi-auto carrier machined completely from billet ordnance steel. RCM US made SP5K carrier is made to the most updated and latest SP5K specs and more. Tungsten filled, heat treated, phosphate finish and all...HKP-20983$159.95 -
On Sale
FMP HK 21 Stripped Bolt Carrier
Now: $387.95Was: $499.95FMP HK 21 Stripped Bolt Carrier New old stock stripped HK21 FMP Full auto bolt carrier. It is missing the catch lever assembly (see pictures). May have storage marks or light rust on the unfinished bottom portion. Long since out of production and no...HKP-20034Now: $387.95Was: $499.95 -
H&K HK MR762 Bolt Carrier
H&K Heckler & Koch
$499.95H&K HK MR762 Bolt Carrier New HK German production.HKP-16626$499.95 -
Michaels Machines HK UMP .45 Semi-Auto Bolt Group - Complete
Michaels Machines
$749.95Michaels Machines HK UMP .45 Semi-Auto Bolt Group - Complete MM’s UMP Tungsten filled UMP .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...HKP-20627$749.95 -
Out Of Stock
H&K 21E/23E (7.62x51/.308) & (5.56/.223) Recoil Spring
H&K Heckler & Koch
$79.95New German HK Factory 21E & 23E Recoil SpringHKP-02001$79.95 -
Michaels Machines HK UMP .40 Semi-Auto Bolt Group - Complete
$649.95Michaels Machines HK UMP .40 Semi-Auto Bolt Group - Complete MM’s UMP tungsten filled UMP .40 bolt carrier. Heat treated, parkarized and polished for the best look and function possible, as an added bonus it now includes German HK internals which...HKP-20626$649.95 -
MM HK UMP (.40 S&W) Conversion Kit
Michaels Machines
$999.95HK UMP 40 Caliber Conversion Kit With this UMP Conversion kit, UMP .45 sub guns can be converted to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub guns. This is a simple drop-in conversion. The time required to change...HKP-18754$999.95 -
Out Of Stock
MM HK UMP/USC (9mm) Semi Auto Bolt Carrier
Michaels Machines
$699.95HK UMP/USC (9mm) Semi Auto Bolt Carrier The semi-auto bolt group is needed for HK USC to HK UMP caliber conversions. The full-auto bolt carrier will not work in HK USC rifles. Specifications: Tungsten Filled Heat Treated Parkerized &...HKP-02283$699.95 -
GSG9 HK G36 Complete Bolt Carrier
GSG9
$529.95HK G36 Bolt Carrier Complete with Handle Compatible With: G36 G36K G36C Will NOT work with a HK SL8hkp-18984$529.95 -
H&K 23E (5.56/.223) 20T Locking Piece - 70 Degree
H&K Heckler & Koch
$299.95HK23E 70 Degree 20T Locking Piece - German HK New This is hard to find as the HK23E or the parts for the HK23E are no longer in production.HKP-01451$299.95 -
H&K G36/SL8 (5.56/.223) Bolt Hold Open Catch
H&K Heckler & Koch
$59.95H&K G36/SL8 (5.56/.223) Bolt Hold Open Catch New HK German manufacture. Compatible With: SL8-1 SL8-6HKP-16378$59.95 -
H&K HK 416 A5 Bolt Carrier Complete
H&K Heckler & Koch
$2,349.95German H&K HK 416 A5 Bolt Carrier Complete Get your hands on that critical puzzle piece for your factory-correct 416A5 build. Fully assembled and ready to drop into your uper receiver. Bolt carriers may be marked ".223 Rem" or "5.56 x 45"...HKP-21500$2,349.95 -
H&K HK 417/MR556 Pin Look Index
H&K Heckler & Koch
$6.95HK 417, MR556, & MR762 Pin Look IndexHKP-02639$6.95 -
H&K HK MR762/417 Cartridge Extractor
H&K Heckler & Koch
$94.95H&K HK MR762/417 Cartridge ExtractorHKP-16842$94.95 -
Out Of Stock
H&K PSG1 (7.62x51/.308) Firing Pin Spring
H&K Heckler & Koch
$0.00HK German PSG-1 Firing Pin Spring. New HK German. A Great Item To Have On Hand As A Spare.HKP-00535$0.00 -
H&K 21E/23E/11E (7.62x51/.308) & (5.56/.223) #9 Locking Piece - 40 Degree
H&K Heckler & Koch
$199.95New HK German #9 Locking Piece The number 9 locking piece is 40 degrees. This will work with both .223 & .308 firearms and for custom builds and applications. This item is no longer available from HK and is out of production. Compatible With:...HKP-00548$199.95 -
H&K MP5 40/10 Low Impulse Locking Piece #24
H&K Heckler & Koch
$129.95New HK German MP5 40 or MP5 10mm Low Impulse Locking Piece Marked #24 This is the factory 90-degree locking piece. Used for standard loads with low to average impulses. Compatible With: MP5 10 MP5 40 MP5 .357HKP-00438$129.95 -
HK 91/G3 (7.62x51/.308) Bolt Head - Stripped
$96.95New US Made Bolt Head- Incomplete: CNC machined from HK blueprints to precise tolerances that use the proper steel and heat-treat processes. You WILL NOT find a better quality offering of HK Parts anywhere. All of the bolt heads we offer on our website...HKP-16636$96.95 -
HK German Locking Roller Standard 8mm - Used
H&K Heckler & Koch
$9.95HK German Locking Roller Standard 8mm - Used The 8mm roller is the proper roller size for standard "zero" function. The correct 8mm roller is essential for proper head spacing & bolt gap. Used HK German. HK locking roller, standard, 8mm. HK German...HKP-20600$9.95 -
HKP MP5 40/10 Full Auto Bolt Carrier
HKP HK Parts
$149.95HKP MP5 40/10 Full Auto Bolt Carrier Machined completely from billet ordnance steel. This carrier is made to the latest specs and is Tungsten filled, and heat treated providing the finest American made carrier available. Not to be confused with cheap...HKP-18363$149.95 -
HKP MP5SD 40/10 110 Degree Locking Piece
HKP HK Parts
$49.95MP5 40 & MP5 10mm SD 110 Degree Locking Piece - USA Made in the USA from an enhanced material and heat treated to factory specifications. Each US made MP5 40/10 SD 110 degree locking price is designed for use with the MP5 40/10 SD variants...HKP-18274$49.95 -
Omega HK UMP .45 Semi Auto Bolt Carrier - Complete
OMEGA
$359.95Omega HK UMP .45 Bolt Carrier Complete - Semi Auto Replacement part for USC to UMP conversions. Marked .45 semi auto just like the OEM carrier. Compatible With: HK UMP .45 Includes: Extractor Firing Pin Firing Pin Spring Firing Pin Retaining Pin The...HKP-21316$359.95 -
On Sale
TPM Ruger Bolt Shroud - Bronze
Tactical Precision MFG
Now: $49.95Was: $66.99TPM Ruger Bolt Shroud - Bronze This Ruger American rifle bolt shroud is hands down the best RAR bolt shroud on the market. Each bolt shroud is made in house on a five-axis Swiss lathe to exacting tolerances out of grade 5 (6al4v) titanium...HKP-20905Now: $49.95Was: $66.99 -
$7.95 -
H&K HK MR556/416 Ejector Spring
H&K Heckler & Koch
$39.99HK 416 & MR556 Ejector Spring Compatible With: HK 416 HK MR556HKP-02538$39.99 -
H&K HK SL6 Bolt Head Complete With Locking Piece
H&K Heckler & Koch
$299.95HK SL6 Bolt Head Complete with Locking Piece New old stock and the last units available from HK. Each combo set is a new HK SL6 bolt head complete and locking piece. New unfired but may have some storage marks or light surface imperfections. Last call as...HKP-17496$299.95 -
H&K MP5 40/10 Factory Full Auto Bolt Carrier
H&K Heckler & Koch
$499.95New HK German MP5 40/10 Factory F/A Bolt Carrier This is the latest and greatest version of the MP5 40 and MP5 10mm carrier. No longer in production or manufactured. Tungsten-filled German HK and the real deal.HKP-00452$499.95 -
Out Of Stock
H&K MP5 Full Auto Bolt Group Complete- IB DATE CODE
H&K Heckler & Koch
$0.00MP5 Full Auto Bolt Group Complete - IB DATE CODE-NEW OLD STOCK HK German 9mm MP5 full auto bolt carrier IB dated new old stock in 100% working order. These bolt groups are HK German MP5 Limited quantity available.Heckler & Koch bolt groups are now...HKP-00662$0.00 -
H&K USC (.45 ACP) Bolt Group- Incomplete
H&K Heckler & Koch
$699.95HK German USC .45 Factory Semi Bolt - Incomplete HK German USC, Omega GS 45 caliber bolt carrier that is stripped. Just add the firing pin, firing pin spring, extractor and firing pin retaining pin for a complete bolt. Made in Germany.HKP-17011$699.95