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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HK417, MR762 Bolt Carrier
H&K Heckler & Koch
$519.95H&K HK MR762 Bolt Carrier New HK German production. Compatible With: HK MR762A1, A4 HK 417$519.95 -
$79.95 -
Out Of Stock
HK21 Locking Piece - 7.62x51/.308
H&K Heckler & Koch
$149.95H&K HK21 (7.62x51/.308) Locking Piece - New Factory, Old Stock The HK21 standard 50-degree locking piece. Each LP includes the hardness "dot" to identify them as HK 21 locking pieces.$149.95 -
Out Of Stock
HK21E, HK23E, PSG1, PTR Extractor
Michaels Machines
$275.95Michaels Machines HK21E, HK23E, PSG1, MSG90 Extractor Replacement extractor for HK21E, HK23E, PSG1, and MSG90 bolt heads. Extractors are a known wear item on these platforms and are no longer produced by HK. The Michaels Machines extractor is a precise,...$275.95 -
Out Of Stock
HK USC, UMP Bolt Carrier - Semi- Auto - 9mm - Incomplete
Michaels Machines
$499.95HK UMP 9mm - Semi-Auto Bolt Stripped The semi-auto bolt is required for HK USC to HK UMP caliber conversions. The full-auto bolt carrier will not work in HK USC rifles. Features: Tungsten filled Heat treated Parkerized & polished Marked 9X19mm just...$499.95 -
HK G41 Spring - Firing Pin
H&K Heckler & Koch
$9.95HK G41 Firing Pin Spring Compatible With: HK G41$9.95 -
Out Of Stock
HK416, MR556A1 Bolt Head - Complete
H&K Heckler & Koch
$0.00H&K HK MR556 A1 Complete Bolt Head Brand new factory German bolt head with all the components to make the bolt head complete. Compatible With: HK MR556 A1$0.00 -
HK G36, SL8 Bolt Catch - Bolt Hold Open
H&K Heckler & Koch
$59.95H&K G36/SL8 (5.56/.223) Bolt Hold Open Catch New HK German manufacture. Compatible With: SL8-1 SL8-6$59.95 -
Out Of Stock
HK21, PSG1, MSG90 Extractor - Factory - 7.62x51 and .308 - 5.56 and .223
H&K Heckler & Koch
$129.95HK21E, 11E, PSG1, MSG90 Factory German HK Extractor$129.95 -
HK MP5 Complete Bolt Head - 10mm / .40 S&W
RCM
$211.95HK MP5 40/10 Bolt Head Complete - RCM- US Each bolt head incorporates the same enhanced material as all of the new RCM products. Ideal to replace out of spec, worn or broken bolt heads or for that custom build. Each bolt head will work and fit on...$211.95 -
On Sale
HK MP5 Recoil Spring
MKE
Now: $6.34Was: $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 buildsNow: $6.34Was: $10.99 -
HK MSG90 Locking Roller -4 - 7.96mm Set -Titanium
H&K Heckler & Koch
$329.95MSG90 (7.62x51/.308) -4 Rollers 7.96mm Set -Titanium Half moon rollers. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to remember the size you need to order - plus-size rollers...$329.95