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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Out Of StockOn Sale
PTR HK G3/91 (7.62x51/.308) Locking Piece- 45 Degree
PTR
Now: $19.75Was: $21.9545 Degree Locking Piece - US Made PTR standard 45 degree locking piece made in the USA by PTR and is design to be a direct replacement for all .308 HK style firearms. Compatible With: G3 PTR 91 HK 91 Other costume clonesNow: $19.75Was: $21.95 -
On Sale
HK416, MR556 Pin - Retaining - Ejector
H&K Heckler & Koch
Now: $6.25Was: $6.95H&K HK MR556/416 Ejector Retaining Pin This factory HK German part is the pin that holds the ejector in place on the bolt head. Great to have as a spare part. Compatible With: HK MR556 HK 416Now: $6.25Was: $6.95 -
On Sale
HK MP5 Axle Rod and Pin Combo - Bolt Hold Open - 10mm / .40 S&W
HKP HK Parts
Now: $39.96Was: $49.95HK MP5 40, MP5 10 Bolt Hold Open Axle Rod & Pin Combo Each bolt hold open rod axle includes the 2 pre-drilled holes for the threaded activation screw and the clamping sleeve. This offering includes both the axle rod and the threaded screw for the...Now: $39.96Was: $49.95 -
On Sale
HK USC/UMP (.40 S&W) Extractor
H&K Heckler & Koch
Now: $49.46Was: $54.95HK German UMP Or USC .40 Extractor New HK German factory OEM part. This is a high wear and replacement item as the .40 cal cartridge has a high impulse that results in an increased occurrence of this extractor wearing out and breakage. A must-have...Now: $49.46Was: $54.95 -
Out Of StockOn Sale
AR-15 Firing Pin - Enhanced
Tactical Precision MFG
Now: $11.96Was: $24.99TPM AR-15 Enhanced Firing Pin These AR-15 firing pins are precision machined using CNC Swiss turning centers. The titanium AR-15 firing pin is made from Grade 6 titanium which has an ultimate tensile strength of 140,000 psi. titanium is 40% lighter than...Now: $11.96Was: $24.99 -
On Sale
HK MP5, MP5K Extractor - 9mm - MKE
MKE
Now: $17.95Was: $19.95MKE HK MP5/K 9mm Extractor Keep your MP5 or MP5K running strong with this MKE 9mm extractor. Perfect for replacing a worn part or completing a build, it’s made to HK specs for smooth, reliable performance you can count on. Compatible With: HK...Now: $17.95Was: $19.95 -
On Sale
HK G36, SL8 Retaining Pin And O-Ring
H&K Heckler & Koch
Now: $10.75Was: $11.95Retaining Pin For Firing Pin Complete With O-Ring Compatible With: HK G36 HK SL8Now: $10.75Was: $11.95 -
Out Of StockOn Sale
HK -2 Roller For Bolt Head 7.98mm - Under-sized
H&K Heckler & Koch
Now: $17.95Was: $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. Please Note: The price listed is per roller. Order 2 (pair) for...Now: $17.95Was: $19.95 -
On Sale
HK416, MR556 Bolt Carrier
H&K Heckler & Koch
Now: $358.15Was: $397.95H&K HK MR556/416 Factory Bolt Carrier With The Newer Style Bolt Retaining Key This is the factory one-piece carrier that has the out-of-battery disconnect and the bolt retaining latch assemblies installed to make up the HK MR556 (556...Now: $358.15Was: $397.95 -
On Sale
HK G36, SL8 Firing Pin
GSG9
Now: $26.05Was: $28.95HK G36, G36K, G36C & SL8 Firing Pin - USA A must have spare part for all G36 models. Made in the USA. Fully machined and nitrided for superior strength. Compatible With: G36 G36K G36C SL8Now: $26.05Was: $28.95 -
On Sale
HK G36, SL8 Bolt Group Fork
USA
Now: $9.86Was: $10.95G36 & Sl8 Bolt Group Fork For Cocking Handle - USNow: $9.86Was: $10.95 -
On Sale
HK G36, MP7 Bolt O-Ring - Firing Pin
H&K Heckler & Koch
Now: $8.96Was: $9.95HK G36 & MP7 Firing Pin - Bolt O-Ring Compatible With: HK G36 HK MP7Now: $8.96Was: $9.95