Bolt Carrier Groups
Discover top-quality Heckler and Koch bolt carrier groups at HK Parts, including the HK MP5 bolt carrier, HK 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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On Sale
HK91, G3 Locking Piece - 45 Degree - USED
H&K Heckler & Koch
Now: $13.95Was: $14.95Heckler and Koch German Locking Piece for HK G3 and HK91- USED This is the factory correct 45 degree locking piece for HK91 and G3 firearms. Used pulled from de-milled firearms and will range in condition but perfectly usable.HKP-16712Now: $13.95Was: $14.95 -
On Sale
HK MP5F, MP5 40/10 Recoil Rod Assembly - Complete
H&K Heckler & Koch
Now: $71.95Was: $79.95German HK MP5F Recoil Assembly This is the factory-correct MP5F or MP5 40/10 Recoil Rod assembly. Most commonly used for MP5's that are using +P or +P+ ammunition or any high impulse 9mm. Or for all MP5 40 or 10-mm bolt groups. A great upgrade to have...HKP-00133Now: $71.95Was: $79.95 -
On Sale
HK33, HK93 Locking Piece - 300 BLK
RCM
Now: $44.95Was: $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, HK33HKP-15547Now: $44.95Was: $49.95 -
On Sale
HK G36, G36K, G36C Bolt Carrier - Full Auto - Tungsten Filled
GSG9
Now: $467.95Was: $549.95HK G36 Tungsten Filled - Bolt Carrier Complete - Full Auto Compatible With: G36 G36K G36C Will NOT work with a factory HK SL8HKP-19030Now: $467.95Was: $549.95 -
On Sale
HK G36, SL8 Extractor Axle - USA
Now: $5.95Was: $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-18370Now: $5.95Was: $6.95 -
On Sale
HK91, G3 Bolt Carrier - Full Auto - Tungsten Filled - Surplus
H&K Heckler & Koch
Now: $224.95Was: $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 refinished...HKP-01998Now: $224.95Was: $249.95 -
On Sale
PTR PDW Bolt Carrier - Full Auto - 7.62x39 / 7.62x51 / .308
PTR
$206.95 - $281.95PTR PDW (7.62x39) & (7.62x51/.308) Pistol Full Auto Bolt Carrier Made by PTR using the same blueprints and materials the German HK factory uses has allowed PTR91 to manufacture the finest of HK style firearms here in the US. The PDW F/A carrier is...HKP-20165-M$206.95 - $281.95 -
On Sale
HK MP5 Recoil Spring
MKE
Now: $7.95Was: $10.99MKE HK MP5 Recoil Spring Great replacement and spare recoil spring as this is a common repair and replacement item. Compatible With: HK MP5 Century Arms AP5 Clones & custom buildsHKP-22239Now: $7.95Was: $10.99 -
Out Of Stock
HK G36, SL8 Bolt Catch
H&K Heckler & Koch
$24.95HK G36 & SL8 Bolt Catch On AR-15 systems this part would be similar to a cam pin. Compatible With: G36 G36K G36C SL8 variantsHKP-02472$24.95 -
On Sale
HK33, HK53, HK93 Bolt Head, Complete
RCM
Now: $182.95Was: $214.95HK 93, 33, 53 .223/5.56 Bolt Head Complete - US The latest generation style bolt head with oval shaped roller retainer plate. Perfect for 556/ .223 & 300 BLK HK or roller lock firearms. Includes: 223/556 Extractor- US Extractor Spring- HK 8mm...HKP-16722Now: $182.95Was: $214.95 -
On Sale
HK G36, SL8 Ejector Spring
USA
Now: $16.95Was: $19.95HK G36 & SL8 Series Of Ejector Spring. Great item to have on hand as this is prone to wear and breakage- US.HKP-18374Now: $16.95Was: $19.95 -
On Sale
HK MP5K Bolt Carrier - Semi Auto
RCM
Now: $132.95Was: $146.95RCM HK MP5K Semi Auto Carrier MP5K, SP89 semi-auto carrier machined completely from billet ordnance steel. RCM's US made MP5K carrier is made to the most updated and latest MP5K specs and more. Tungsten filled, heat treated, phosphate finish and...HKP-20982Now: $132.95Was: $146.95