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
Now: $22.45Was: $24.95 -
On Sale
HK416, MR556 Catch - Firing Pin - Titanium
HKP HK Parts
Now: $39.96Was: $49.95HK MR556 & HK416 Firing Pin - TitaniumGrade 6 weapons grade Titanium manufacture. Made 100% in the USA A must have upgrade to have on hand as the firing pin is one of the most abused components in the HK MR556 & HK 416 weapon system. Get the...Now: $39.96Was: $49.95 -
On Sale
HK G36, SL8 Rod Spring - Gas Piston
H&K Heckler & Koch
Now: $8.99Was: $9.99HK G36 & SL8 Piston Rod Spring A must-have spare repair and replacement part. New HK German factory part. Compatible With: HK G36 HK SL8Now: $8.99Was: $9.99 -
Out Of Stock
HK G36 Bolt Head - Complete
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,...$0.00 -
Out Of StockOn Sale
HK PTR PDW Bolt Group - Complete
HKP HK Parts
Now: $303.96Was: $379.95US Made PTR Bolt Group Complete Semi-Auto 308. Factory correct bolt head and locking piece for use in the PTR PDW chambered in 7.62X51 or 308. Brand new May 2015 manufacture. This is the correct bolt for all PTR PDW with 8" barrels.Now: $303.96Was: $379.95 -
On Sale
HK91, G3 Bolt Head - Stripped
Now: $87.26Was: $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...Now: $87.26Was: $96.95 -
HK MP5, MP5K 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...$49.95 -
On Sale
HK MP5 Bolt Carrier - Full Auto - .40, 10mm
HKP HK Parts
Now: $119.96Was: $149.95HKP MP5 40/10 Full Auto Bolt Carrier Machined completely from billet ordnance steel and black oxide finished. This carrier is made to the latest specs, tungsten filled, and heat treated. Made in the USA and available exclusively at HK Parts...Now: $119.96Was: $149.95 -
HK MP5K Bolt Group - Complete - Full Auto - 9mm
H&K Heckler & Koch
$2,974.95MP5K Full Auto Bolt Group "F" Style Complete - German Each factory HK MP5K bolt group includes the following: MP5K F/A - F style bolt carrier F style bolt head 100 degree locking piece firing pin firing pin spring recoil rod assembly Extremely rare...$2,974.95 -
On Sale
FMP Locking Piece - USED
H&K Heckler & Koch
Now: $8.93Was: $14.95FMP Locking Piece - USED SOLD INDIVIDUALLY USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK German Locking Piece For FMP - USED. This is the factory correct for FMP firearms. Used pulled from...Now: $8.93Was: $14.95 -
On Sale
HK21 Bolt Carrier - Stripped - Incomplete
FMP HK CONTRACT
Now: $349.15Was: $499.95FMP HK 21 Stripped Bolt Carrier New old stock stripped HK21 FMP Full auto bolt carrier. 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 longer...Now: $349.15Was: $499.95 -
On Sale
HK UMP Caliber Conversion to .40 S&W Kit - 7.87" Barrel - 30 Round Magazine
Michaels Machines
Now: $899.96Was: $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...Now: $899.96Was: $999.95