Bolt Carrier Groups

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
    New - HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) Complete Recoil Rod Assembly - HKP-17989 HK UMP, USC 9mm / .40 S&W / .45 ACP Complete Recoil Rod Assembly
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    HK UMP, USC 9mm / .40 S&W / .45 ACP Complete Recoil Rod Assembly

    HKP HK Parts

    Now: $47.96
    Was: $59.95
    HK USC, UMP 45/40/9mm Recoil Spring/Rod Assembly New USA made recoil assembly complete. Our design allows for easy repair and replacement of the recoil spring itself without replacing the entire recoil assembly as found on the German recoil assemblies...
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    Was: $59.95
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  • On Sale
    Used - H&K 91/G3 (7.62x51/.308) F/A Bolt Carrier - Tungsten Filled - Surplus - HKP-01998 HK91, G3 Bolt Carrier - Full Auto - Tungsten Filled - Surplus
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    HK91, G3 Bolt Carrier - Full Auto - Tungsten Filled - Surplus

    H&K Heckler & Koch

    Now: $224.95
    Was: $249.95
    HK 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...
    Now: $224.95
    Was: $249.95
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    New - H&K MP5 40/10 Bolt Hold Torsion Spring - HKP-00455

    HK MP5 Elbow Spring - Cocking Lever

    H&K Heckler & Koch

    Now: $35.96
    Was: $39.95
    MP5 40, 10 Bolt Hold Torsion Spring This is the factory spring used to activate the bolt hold-open lever. Great spare and needed part to have on hand.
    Now: $35.96
    Was: $39.95
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  • On Sale
    New - H&K G36/SL8 (5.56/.223) Bolt Catch - HKP-02472 HK G36, SL8 Bolt Catch
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    HK G36, SL8 Bolt Catch

    H&K Heckler & Koch

    Now: $22.45
    Was: $24.95
    HK G36 & SL8 Bolt Catch On AR-15 systems this part would be similar to a cam pin. Compatible With: G36 G36K G36C SL8 variants
    Now: $22.45
    Was: $24.95
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    New - H&K 21E/11E (7.62x51/.308) Extractor Spring - HKP-00815

    HK21E, HK11E Extractor Spring

    H&K Heckler & Koch

    Now: $22.45
    Was: $24.95
    HK21E & 11E Factory Extractor Spring Made by HK Germany for all HK21E's and 11E's.
    Now: $22.45
    Was: $24.95
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    Now: $22.45
    Was: $24.95
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  • On Sale
    Used - H&K HK G3, HK 91 Locking Piece - Used - HKP-16712 HK91, G3 Locking Piece - Used
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    HK91, G3 Locking Piece - Used

    H&K Heckler & Koch

    Now: $13.46
    Was: $14.95
    H&K HK G3, HK 91 Locking Piece - Used HK German Locking Piece For HK G3 & HK 91- USEDThis is the factory correct 45 degree locking piece for HK 91/G3 firearms. Used pulled from demilled firearms and will range in condition but perfectly usable.
    Now: $13.46
    Was: $14.95
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  • On Sale
    New - HK G36/SL8 (5.56/.223) Extractor Axle - HKP-18370
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    HK G36/SL8 (5.56/.223) Extractor Axle

    Now: $6.25
    Was: $6.95
    HK 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 models
    Now: $6.25
    Was: $6.95
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  • On Sale
    New - USA HK UMP/USC .45 Semi Auto Bolt Carrier - Complete - HKP-18588 HK UMP, USC Bolt Carrier - Semi Auto - .45 ACP - Complete
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    HK UMP, USC Bolt Carrier - Semi Auto - .45 ACP - Complete

    USA

    Now: $359.95
    Was: $399.95
    USA HK UMP/USC .45 Semi Auto Bolt Carrier - Complete Replacement part for USC to UMP conversions. Marked .45 semi auto just like the OEM carrier. Includes: Extractor Firing Pin Firing Pin Spring Firing Pin Retaining Pin Compatible With: HK UMP ...
    Now: $359.95
    Was: $399.95
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    Was: $399.95
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  • On Sale
    New - H&K HK MR556/416 Roll Pin for Catch On Bolt Carrier - HKP-16847
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    HK416, MR556 Roll Pin for Bolt Head Carrier

    H&K Heckler & Koch

    Now: $6.25
    Was: $6.95
    H&K HK MR556/416 Roll Pin for Catch On Bolt Carrier This roll pin is used in the bolt carrier to secure the catch. Compatible With: HK MR556 HK 416
    Now: $6.25
    Was: $6.95
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  • On Sale
    New - HK 91/G3 (7.62x51/.308) Bolt Head Complete - US Made - HKP-00839 HK91, G3 Bolt Head Complete - US Made
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    HK91, G3 Bolt Head Complete - US Made

    Now: $134.95
    Was: $149.95
    Bolt Head - Complete This item is a complete bolt head using a combination of new HK German and New US-made parts. This part counts as 1 US-made compliant part for the 922r compliance. Compatible With: HK 91 HK G3 PTR-91 SAR3/8 Other HK .308 Clones or...
    Now: $134.95
    Was: $149.95
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  • On Sale
    New - HKP HK 93/53/33 (5.56/.223) Firing Pin - Titanium - HKP-17769
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    HK33, HK53, HK93 Firing Pin - Titanium

    HKP HK Parts

    Now: $39.96
    Was: $49.95
    HK93, 33, 53 Firing Pin - Titanium A must have upgrade to have on hand as the firing pin is one of the most abused components in the HK 93, HK33 & HK53 weapon system. Get the lightest, strongest firing pin available for your HK firearm. Ideal for...
    Now: $39.96
    Was: $49.95
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  • On Sale
    New - H&K MP5 40/10 Bolt Hold Open Lever - HKP-01471
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    HK MP5 Bolt Catch Lever - 10mm / .40 S&W

    H&K Heckler & Koch

    Now: $67.45
    Was: $74.95
    MP5 40, MP5 10 Bolt Hold Open Lever - German HK - New  A great upgrade for the out-of-spec and sub-par quality part found on clone builds. Compatible With: MP5 40 MP5 10mm MP5 .357 Sig MP5 9 X 25 Dillon
    Now: $67.45
    Was: $74.95
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