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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H&K Roller Retainer Spring - Action 3
H&K Heckler & Koch
$6.74H&K Roller Retainer Spring - Action 3 This part is the second-generation roller holder. Each retainer fits all "action 3" 9mm MP5 & MP5K bolt heads & MP5 40/10 bolt heads. The roller retainer spring is a common repair and replacement item and...HKP-00068$6.74 -
HKP 1st Gen Roller Retainer Plate To Spring Upgrade
HKP HK Parts
$9.95HKP 1st Gen Roller Retainer Plate To Spring Upgrade This action 3 roller retainer spring for all 1st Generation bolt heads replaces the oval-shaped roller retainer plate. HK made a wire spring as an upgrade for later production bolt heads to improve the...HKP-02119$9.95 -
H&K German Roller Retainer Plate For Rollers
H&K Heckler & Koch
$2.74HK German Roller Retainer Plate For All Rollers - Used This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with the use and age of the service weapon. Compatible With All Original 1st...HKP-02690$2.74 -
H&K MP5 Bolt Group Backup Kit - Action 3
H&K Heckler & Koch
$22.95H&K MP5 Bolt Group Backup Kit - Action 3 This kit includes the highest wear and replace items on the MP5 action 3 bolt group, as well as the easy to lose pin. Includes: Factory German MP5 9mm Extractor Spring Factory German Action 3 Roller Retainer...HKP-16993$22.95 -
H&K Roller Retainer Pin - New Style
H&K Heckler & Koch
$6.95HK Roller Retainer Pin, Clamping Sleeve- New Style This part works with all roller retainer plates and springs. HK started this change of roller retainer pins starting in all 2011-produced bolt heads. Works with all styles of roller retainer plates...HKP-01954$6.95 -
H&K Locking Roller Pin For Bolt Heads
H&K Heckler & Koch
$6.95H&K Locking Roller Pin For Bolt Heads HK roller retainer pin or clamping sleeve (holds roller retainer plate in place). Each retainer pin works with all roller retainer plates & springs. All 3 types including oval-shaped roller retainer...HKP-00066$6.95 -
HKP Roller +8 - New - 8.08mm
HKP HK Parts
$8.99Roller +8 - New - 8.08mm HK Parts Standard (8.08 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19437$8.99 -
H&K Roller For Bolt Head 8.00mm - Standard
H&K Heckler & Koch
$12.95H&K Roller For Bolt Head 8.00mm - Standard The 8mm roller is the proper roller size for the standard "zero" function. The correct 8mm roller is essential for proper head spacing and bolt gap. New HK German, not surplus or used goods, that are worn...HKP-00506$12.95 -
HKP Roller +6 - New - 8.06mm
HKP HK Parts
$8.99Roller +6 - New - 8.06mm HK Parts Standard (8.06 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19439$8.99 -
HKP Roller +2 - New - 8.02mm
HKP HK Parts
$8.99Roller +2 - New - 8.02mm HK Parts Standard (8.02 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19423$8.99 -
HKP Roller +4 - New - 8.04mm
HKP HK Parts
$8.99Roller +4 - New - 8.04mm HK Parts Standard (8.04 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19441$8.99 -
H&K MP5 & MP5K F Style Roller Retainer Plate - 3rd Gen
H&K Heckler & Koch
$14.95HK German "F" Style 3rd Gen Roller Retainer Plate This is the latest and greatest German design of roller retainer plates found in all of the latest production of HK German bolt heads. The MP5 F roller retainer plate fits true F-style bolt heads only...HKP-00069$14.95 -
H&K +4 Roller For Bolt Head 8.04mm - Over-sized
H&K Heckler & Koch
$14.95H&K +4 Roller For Bolt Head 8.04mm - Over-sized New HK German not surplus or used goods. The correct roller is essential for proper head spacing and the bolt gap. Compatible With: HKG3, 91 & PTR HK93, 33, 53 HK MP5, MP5K Cetme, C308 Clones...HKP-00508$14.95 -
H&K +2 Roller For Bolt Head 8.02mm - Over-sized
H&K Heckler & Koch
$24.95H&K +2 Roller For Bolt Head 8.02mm - Over-sized New HK standard (8.02 mm) locking roller. The proper roller size is essential for a proper bolt gap. New HK German, not surplus or used out-of-spec part. Please Note: The price listed is per roller...HKP-00507$24.95 -
RCM MP5 9mm Full Auto Bolt Carrier
RCM
$179.95MP5 9mm Full Auto Bolt Carrier - RCM New US RCM manufactured MP5, 94 F/A carrier with all current "F" style upgrades and tungsten filled for the best performance and the utmost reliability. They were machined completely from billet ordnance grade steel...HKP-01188$179.95 -
HKP HK 91/93/33/53/G3 (5.56/.223) & (7.62x51/.308) Bolt Carrier Assembly & Disassembly Tool
HKP HK Parts
$19.87HK Bolt Carrier Assembly & Disassembly Tool 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. A must-have for all HK collectors and shooters. This is the original...HKP-00785$19.87 -
RCM HK MP5 Complete HK Style 9mm Bolt Group
RCM
$409.95Complete Bolt Group - RCM - HK Style MP5 9mm Ideal to replace out of spec, worn or broken bolt groups or for that custom build. This is the finest US BCG available. Each bolt group comes complete, assembled ready to go. Includes: Bolt head complete 100...HKP-19317$409.95 -
RCM HK MP5/SP5 #27/90 Degree Locking Plate
RCM
$34.95RCM HK MP5/SP5 #27/90 Degree Locking Plate Machined and properly heat treated from ordnance grade steel. A must have component for users runing a suppressed set up or cycling a variety of ammunition. This will assist with fine-tuning pistol...HKP-21334$34.95 -
H&K Roller Retainer Plate For Rollers
H&K Heckler & Koch
$25.95New HK German Roller Retainer Plate For Rollers This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with use and age of the service weapon. Compatible With: MP5, 94 MP5K, SP89 HKG3, 91,...HKP-00065$25.95 -
HKP Roller +9 - New - 8.09mm
HKP HK Parts
$8.99Roller +9 - New - 8.09mm HK Parts Standard (8.09 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19438$8.99 -
RCM MP5K/SP89 9mm Full Auto Bolt Carrier
RCM
$179.95MP5K Full Auto Bolt Carrier - US- Made - RCM This part is machined from billet ordnance steel. Our US-made MP5K carrier is made to the most updated and latest MP5K F specs. Tungsten filled, heat treated, and factory fresh production. Providing the finest...HKP-01190$179.95 -
H&K Roller Type Trip Lever
H&K Heckler & Koch
$29.95H&K Roller Type Trip Lever This is a genuine German Heckler & Koch part. This is the newer style trip lever for use with a roller sear catch, not the older friction type. Please Note: May or may not be marked with the X or XX...HKP-02466$29.95 -
HKP Roller +3 - New - 8.03mm
H&K Heckler & Koch
$8.99Roller +3 - New - 8.03mm HK Parts Standard (8.03 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19425$8.99 -
HKP Roller +7 - New - 8.07mm
HKP HK Parts
$8.99Roller +7 - New - 8.07mm HK Parts Standard (8.07 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19442$8.99 -
H&K MP5/MP5K, HK SP5 & SP5K 100 Degree Locking Piece
H&K Heckler & Koch
$89.95H&K MP5,MP5K, HK SP5 & SP5K 100 Degree Locking Piece The MP5 100-degree locking piece is the factory-correct locking piece for all HK MP5 and MP5K style firearms. Compatible With: MP5, MP5 F, HK SP5 MP5K, MP5K-N HK94, SP89 & SP5K Clones or...HKP-00134$89.95 -
HKP SP5K Spec - Full Auto Bolt Carrier
RCM
$189.95HK SP5K Specification Full Auto Bolt Carrier - US Made Machined completely from billet ordnance grade steel. The HK SP5K carrier is made to the most updated and latest MP5K F specs that will fit the SP5K. Tungsten filled, heat treated, & factory...HKP-17932$189.95 -
Out Of Stock
RCM HK Style MP5K 9mm Complete Bolt Group
RCM
$379.95Complete Bolt Group - RCM - HK Style MP5K 9mm Ideal to replace out of spec, worn or broken bolt groups or for that custom build. Each bolt group will work and fit on semi or full auto MP5K 9mm style firearms. This is the finest US BCG available. Each...HKP-19846$379.95 -
H&K German Roller +2 - Used - 8.02mm
H&K Heckler & Koch
$7.95H&K German Roller +2 - Used - 8.02mm Used HK standard (8.02 mm) locking roller. The proper roller size is essential for proper bolt gap. HK German Manufacture. Price is per roller. **You need to order two for a complete set (pair) for bolt head.**HKP-19366$7.95 -
Out Of Stock
H&K HK G3/91/PTR F/A Complete Training Bolt Group
H&K Heckler & Koch
$499.95H&K HK G3/91/PTR F/A Complete Training Bolt Group Surplus HK German Plastic training ammo bolt group. To be used with the readily available and cheap plastic tipped training ammo only! A neat collectible item as only a small number were made...HKP-18265$499.95 -
RCM HK MP5SD 9mm Complete Bolt Group
RCM
$409.95Complete Bolt Group - RCM - HK MP5SD 9mm Ideal to replace out of spec, worn or broken bolt groups or for that custom build. Each bolt group will work and fit on semi or full auto MP5SD 9mm style firearms. This is the finest US BCG available...HKP-19665$409.95 -
H&K Roller Sear For SEF, Navy Trigger Packs
H&K Heckler & Koch
$29.95H&K Roller Sear For SEF & Navy Trigger Packs It is the newer style, not the older friction type of sear. This item is also referred to as the catch with a roller but is more commonly called a sear.HKP-01710$29.95 -
HKP Roller +1 - New - 8.01mm
H&K Heckler & Koch
$8.99Roller +1 - New - 8.01mm HK Parts Standard (8.01 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Price is per roller.**You need to order two for a complete set (pair) for bolt head.**HKP-19424$8.99 -
H&K Standard Roller 8.00mm - Used
H&K Heckler & Koch
$7.958.00mm Standard Size (zero or unmarked) For HK Roller Lock Bolt Head HK spec new unmarked 8.00mm roller that will fit all HK bolt heads including HK91/G3, HK93/33/53, HK94, MP5, SP89 all clones and the Cetme & Cetme clones. An easy way to remember...HKP-19374$7.95 -
H&K HK MP5 German 9mm Trigger Pack Complete F/A Roller Sear, XX Struted/Pinned Hammer
H&K Heckler & Koch
$369.95H&K MP5/K 9mm Full Auto Complete Trigger Pack his factory HK German MP5 9mm full auto trigger pack is provided as originally configured by HK Germany. This trigger pack has been meticulously preserved from a demilled 1980s production MP5 and comes...HKP-19342$369.95 -
H&K 91/G3 (7.62x51/.308) Complete F/A Bolt Group - Used
H&K Heckler & Koch
$349.95HK Factory German G3, 91, PTR F/A Bolt Group - Complete Used Everything you need as a spare or a direct replacement of your existing bolt group. This bolt group is a direct replacement of all HK G3, HK91, SAR3/8, PTR-91, C91, Clones, Etc. Bolt...HKP-00356$349.95 -
H&K 91/G3 (7.62x51/.308) Full Auto Bolt Carrier - Surplus
H&K Heckler & Koch
$149.95HK G3 Factory Full Auto Bolt Carrier - German German HK 70'- 80's production used surplus bolt carrier with locking lever, spring, and axle pin installed. Most are NOT date-coded on the top of the carrier. Most will be marked on the side or, more...HKP-01952$149.95 -
H&K MP5 & MP5K Stop Pin, Axle Set For Bolt Carrier
H&K Heckler & Koch
$14.95MP5 & MP5K Stop Pin, Axle Set For Bolt Carrier Each set is designed to keep the locking piece clocked at the correct location and in place when the stop axle and pin set are installed in the carrier. This item can become damaged...HKP-02558$14.95 -
Out Of Stock
H&K -2 Roller For Bolt Head 7.98mm - Under-sized
H&K Heckler & Koch
$19.95H&K -2 Roller For Bolt Head 7.98mm - Under-sized The proper roller size is essential for proper head spacing and bolt gap. New HK German not surplus or used goods. German-made -2 roller, each roller is priced per roller.HKP-00505$19.95 -
HK G36/SL8 (5.56/.223) Extractor Axle
$6.95HK G36, SL8 Extractor Axle- US Made New extractor axle for use on all G36, Sl8 bolt heads. This part can become heavily worn and is prone to breakage. Compatible With: HK G36 models HK Sl8 modelsHKP-18370$6.95 -
H&K 91/G3 (7.62x51/.308) F/A Bolt Carrier - Tungsten Filled - Surplus
H&K Heckler & Koch
$249.95HK Factory F/A Tungsten Filled Bolt Carrier Used German Surplus The tungsten upgrade is ideal for those with bolt bounce issues or who want the smoothest carrier for FA use. These carriers are all used and in good shape and need to be...HKP-01998$249.95