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 91/G3 (7.62x51/.308) Firing Pin Spring
H&K Heckler & Koch
$9.95HK German HK G3, HK91, & PTR Firing Pin Spring This is a common repair and replacement item and is great for spares as this is a common breakage part.HKP-00498$9.95 -
H&K MP5 & HK94 Recoil Rod Assembly
H&K Heckler & Koch
$59.95H&K MP5 & HK94 Recoil Rod Assembly HK German MP5 and HK94 recoil rod assemblies come complete with rod, spring, nylon rings, end caps, and rivets installed. This is a great item to have on hand as a spare part as this is a wear-and-tear...HKP-00132$59.95 -
H&K MP5, HK94, MP5K, SP89 & SP5K Firing Pin
H&K Heckler & Koch
$49.95H&K MP5, HK94, MP5K, SP89 & SP5K Firing Pin - German Compatible With: MP5 HK94 MP5K SP89 SP5KHKP-00061$49.95 -
HKP Roller +5 - New - 8.05mm
HKP HK Parts
$8.99Roller +5 - New - 8.05mm HK Parts Standard (8.05 mm) locking roller, The proper roller size is essential for proper bolt gap. US Manufacture. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to...HKP-19440$8.99 -
RCM MP5SD 9mm Locking Piece - 115 Degree
RCM
$33.95RCM MP5SD 9mm Locking Piece - 115 Degree This locking piece is a US-made version of the factory German MP5SD 115-degree locking piece. Each locking piece is made 100% here in the USA from ordnance grade steel, heat treated, and made to last...HKP-02192$33.95 -
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 -
H&K MP5K/SP89/SP5K 9mm Recoil Spring
H&K Heckler & Koch
$11.95HK German MP5K, SP89 Recoil Rod Assembly Spring This is a great replacement and spare part.HKP-01159$11.95 -
H&K MR556/MR762/416/417 Firing Pin Spring
H&K Heckler & Koch
$14.95H&K MR556/MR762/416/417 Firing Pin Spring This part is great to have on hand as this item is a high wear and replacement part and one of the most common breakage parts on the HK 416/MR556 rifles. Compatible With: HK MR556 HK 416 HK MR762 HK 417 HK...HKP-00928$14.95 -
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. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to...HKP-19442$8.99 -
H&K 91/G3 (7.62x51/.308) Firing Pin
H&K Heckler & Koch
$19.95HK G3, HK91, PTR 762/.308 Firing Pin HK German, new factory part made from steel. Great for spares as this is a common wear item. Compatible With: HK G3 HK91 HK PTR CETME & C308HKP-00497$19.95 -
HKP MP5, MP5K, 94 & SP89 Firing Pin-Titanium
HKP HK Parts
$49.95HKP MP5, MP5K, 94 & SP89 Firing Pin-Titanium Grade 6 Titanium firing pin. Each was made using the factory HK specifications from original HK German blueprints. This is the finest US made Titanium firing pin available anywhere, at any price. Built to...HKP-17601$49.95 -
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 -
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 -
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 -
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. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the...HKP-19366$7.95 -
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. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to...HKP-19424$8.99 -
RCM HK MP5-E 9mm Bolt Head
RCM
$264.95RCM HK MP5-E 9mm Bolt Head Equipped with a heavier duty extractor and extractor spring, the RCM MP5-E bolt head is a drop-in upgrade for all MP5/MP5K's. Spend more time at the range, less time on the bench with this stout bolt head assembly. ...HKP-20954$264.95 -
H&K -4 Roller For Bolt Head 7.96mm - Under-sized
H&K Heckler & Koch
$27.99H&K -4 Roller For Bolt Head 7.96mm - 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 -4 roller, each roller is priced per roller. Please Note: The price listed...HKP-00504$27.99 -
Out Of Stock
RCM 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 -
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. The best roller on the...HKP-19374$7.95 -
H&K 53 Factory Recoil Spring
H&K Heckler & Koch
$14.95HK German HK53 Replacement Recoil Spring This rare spring is a must-have spare for your HK53 firearm.HKP-02228$14.95 -
HKP MP5, HK94 & MP5K 100 Degree Locking Piece
HKP HK Parts
$33.95HKP MP5, HK94 & MP5K 100 Degree Locking Piece Each 100 degree MP5 locking piece is the proper, correct locking piece for all HK MP5, 94 and full size clones as well as this is now the correct locking piece for all HK MP5K & MP5K-PDW variants, per...HKP-18049$33.95 -
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 -
H&K 91/G3 (7.62x51/.308) Firing Pin - Used
H&K Heckler & Koch
$6.95H&K 91/G3 (7.62x51/.308) Firing Pin - Used Great for spares as this is a common wear item. Compatible With: HK G3 & HK 91, PTR or clone riflesHKP-16710$6.95 -
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 HK21 (7.62x51/.308) Recoil Spring
H&K Heckler & Koch
$79.95H&K HK21 (7.62x51/.308) Recoil Spring New HK Factory HK21 triple braided recoil spring. Compatible with early HK21's manufactured by HK and FMP. The 21E requires a different spring.HKP-00238$79.95 -
H&K 93/53/33 (5.56/.223) Firing Pin Spring
H&K Heckler & Koch
$9.95New HK German 93, 33, & 53 .223/5.56 Firing Pin Spring. A must-have spare part as this is a high wear and replacement item. Compatible With: HK93, 33, 53 V93/V53, C93, C53 Custom builds and clonesHKP-00193$9.95 -
H&K MR556/MR762/416/G36 (5.56/.223) & (7.62x51/.308) Extractor Spring
H&K Heckler & Koch
$8.95H&K MR556/MR762/416/G36 (5.56/.223) & (7.62x51/.308) Extractor Spring A must-have replacement wear part and a great item to have on hand. Compatible With: HK G36 HK G36K HK G36C HK SL8 HK MR556 HK 416 HK MR762HKP-00288$8.95 -
H&K HK MP5 German 9mm Trigger Pack Complete F/A Roller Sear, XX Struted/Pinned Hammer
H&K Heckler & Koch
$499.95H&K MP5/K 9mm Full Auto Complete Trigger Pack This factory HK German MP5 9mm full auto trigger pack is offered as it was originally configured by HK Germany. It has been carefully preserved from a demilled 1980s production MP5 and comes complete with...HKP-19342$499.95 -
RCM HK G3K Locking Piece #18 - 50 Degree
RCM
$49.95RCM HK G3K Locking Piece #18 - 50 Degree The #18 LP is the factory-correct locking piece for G3K style builds or other custom builds. The locking piece is the timing mechanism that a delayed roller lock firearm uses to tell the firearm when to unlock and...HKP-02522$49.95 -
H&K HK MR556/MR762/416 Bolt Catch Pin
H&K Heckler & Koch
$4.95H&K HK MR556/MR762/416 Bolt Catch Pin The factory roll pin is used to hold the bolt catch in place. Great to have on hand in the event this item becomes lost or damaged when doing maintenance Compatible With: HK MR556 HK 416 HK MR762HKP-02677$4.95 -
Out Of Stock
H&K MP5K/SP89/SP5K 9mm #28 Locking Piece
H&K Heckler & Koch
$199.95H&K MP5K/SP89/SP5K/SP5K PDW 9mm #28 Locking Piece This is the locking piece that is recommended when using a suppressor and 147-grain or heavier bullets. This will slow the rate of fire while suppressed to safe levels. This locking piece is 80...HKP-00918$199.95 -
RCM HK MP5-E Full Auto Bolt Group
RCM
$459.95RCM HK MP5-E Full Auto Bolt Group Each bolt group incorporates RCM’s F style carrier, MP5-E bolt head, extractor and 100 degree locking piece. This group is 100% US made and the finest out there. Complete and ready to drop in and use. Ideal to...HKP-21351$459.95 -
H&K HK MR556/416 Ejection Door Lock Bolt Pin
H&K Heckler & Koch
$4.95HK MR556 & 416 Ejection Door Lock Bolt Pin Compatible With: HK 416 HK MR556HKP-02536$4.95 -
RCM HK MP5SD 9mm Complete Bolt Group
RCM
$394.95Complete 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$394.95 -
RCM HK 53 Locking Piece #15 - 65 Degree
RCM
$49.95RCM HK 53 Locking Piece #15 - 65 Degree The #15 LP is the correct locking piece for the HK53 and several other custom-build applications. The locking piece is the timing mechanism that a delayed roller lock firearm uses to tell...HKP-02524$49.95 -
H&K HK MR556/416 Firing Pin
H&K Heckler & Koch
$54.95H&K HK MR556/416 Firing Pin New HK German manufactured. This is a great item to have on hand as the firing pin is one of the most abused components in the HK MR556 and HK 416 weapon systems. Compatible With: HK MR556 HK 416 HK CR556 HK...HKP-00045$54.95 -
H&K HK 416 Enhanced Firing Pin/Retaining Pin
H&K Heckler & Koch
$19.95HK 416 Firing Pin Retaining Pin- New Style This part is the newer style pin that is goldish, super hardened, and much less prone to wear and tear. The enhanced version is the most robust, easiest-to-use pin available. Compatible With: HK 416 AR15, M4...HKP-02658$19.95 -
H&K HK MR556/MR762/416 Forward Assist Pin
H&K Heckler & Koch
$4.95H&K HK MR556/MR762/416 Forward Assist Pin Compatible With: HK MR556 HK 416 HK MR762HKP-02662$4.95 -
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