HK Rifle / SMG Parts

HK Rifle / SMG Parts

Elevate Your HK Rifle with Premium Parts – MP5, HK416, SP5, and More!

Enhance your HK rifle with top-notch parts and accessories. From HK MP5 and HK MP5K to HK SP5 and HK UMP or HK USC, we offer a vast selection. Discover high-quality magazines, binary triggers, stocks, grips, barrels, handguards, sights, and more for your firearm. Whether you own an HK416, HK SP5K, HK G36, or HK MP5 22, we have the Heckler and Koch rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.

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  • New - HKP MP5 40/10 Bolt Hold Open Axle Rod & Pin Combo - HKP-17405 HK MP5 Axle Rod and Pin, Bolt Hold Open - .40 S&W, 10mm
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    HK MP5 Axle Rod and Pin, Bolt Hold Open - .40 S&W, 10mm

    HKP HK Parts

    $49.95
    HK 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...
    HKP-17405
    $49.95
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  • New - H&K MP5/MP5K 3-Lug Blank Firing Adapter - HKP-01990 HK MP5, MP5K 3-Lug Blank Firing Adapter
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    HK MP5, MP5K 3-Lug Blank Firing Adapter

    H&K Heckler & Koch

    $169.95
    H&K MP5/MP5K 3-Lug Blank Firing Adapter This part attaches to the end of the 3-lug barrel tip and will allow the use of 9mm blanks for training. A brand new HK German manufactured part. Specifications: 3-Lug Blank Firing Adapter Compatible...
    HKP-01990
    $169.95
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  • HK MP5K, SP5K Binary Trigger Group - SEF Ambi - BFSIII - 9mm - Contoured HK MP5K, SP5K Binary Trigger Group - SEF Ambi - BFSIII - 9mm - Contoured
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    HK MP5K, SP5K Binary Trigger Group - SEF Ambi - BFSIII - 9mm - Contoured

    FA Franklin Armory

    $1,499.95 - $1,549.95
    Franklin Armory HK MP5K - BFSIII HK-C1 – Binary Trigger Group – SEF – Contoured In position 3 it will fire 1 round on pull and 1 round on release. With a 4.5 lb trigger pull, making this the fastest semi-automatic trigger on the market...
    HKP-20005-M
    $1,499.95 - $1,549.95
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  • Out Of Stock
    New -HK G36C Gas Piston Rod Spring Assembly - Black - HKP-00353 HK G36C Gas Piston Rod and Spring

    HK G36C Gas Piston Rod and Spring

    H&K Heckler & Koch

    $89.95
    Heckler and Koch Complete Gas Piston Rod and Spring Assembly for HK G36C A must-have item for HK G36C conversions from G36 to SL8's or for spares for your G36C. New HK German factory OEM part. A high wear and replacement part and a must-have for...
    HKP-00353
    $89.95
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  • New - HKP HK MP5 40 Locking Roller -4 - HKP-17561
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    HK MP5 Locking Roller -4 - .40 S&W

    HKP HK Parts

    $11.95
    HK US MP540 Undersized Locking Roller, -4 The proper roller size is essential for proper headspacing of bolt gap. 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...
    HKP-17561
    $11.95
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  • Out Of Stock
    New - HKP 10 Round MP5 40/10 Magazine Block - HKP-18170 HK MP5, MP5K Magazine Block Plug - 10 to 30 Round Conversion - .40 S&W, 10mm

    HK MP5, MP5K Magazine Block Plug - 10 to 30 Round Conversion - .40 S&W, 10mm

    HKP HK Parts

    $9.95
    HKP HK Parts 10 Round Magazine Block for HK MP5 .40, 10mm MP5 10 to 30 mag block plug. This is designed to use on the HK MP5 40, 10 30 round magazine. Very easy to install and use.  Compatible With: MP5 .40 S&W MP5 10mm Clones or other custom...
    HKP-18170
    $9.95
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  • New - H&K HK MR556/MR762/416/417 Disconnector Spring - Short - HKP-02675
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    HK416, MR556, HK417, MR762 Disconnector Spring - Short

    H&K Heckler & Koch

    $6.99
    Heckler and Koch HK416, MR556, HK417, MR762 Disconnector Spring - Short This is the shorter spring of the 2 found in the trigger assembly. Compatible With: HK416, MR556 HK417, MR762
    HKP-02675
    $6.99
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  • On Sale
    New - HK G36/SL8 Extractor - HKP-18882 HK G36, SL8 Extractor
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    HK G36, SL8 Extractor

    USA

    Now: $39.95
    Was: $67.95
    G36 & HK SL8 Extractor For Bolt Head Compatible With: All G36 variants SL8-1, SL8-6
    HKP-18882
    Now: $39.95
    Was: $67.95
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  • New - H&K USC/UMP (.40 S&W) Extractor - HKP-00264 HK USC, UMP Extractor - .40 S&W
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    HK USC, UMP Extractor - .40 S&W

    H&K Heckler & Koch

    $54.95
    HK 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...
    HKP-00264
    $54.95
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  • New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Cocking Lever Support Tube - HKP-01883 HK UMP, USC Cocking Lever Support Tube
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    HK UMP, USC Cocking Lever Support Tube

    H&K Heckler & Koch

    $19.95
    HK UMP & USC Cocking Lever Support Tube  
    HKP-01883
    $19.95
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  • New - HK 21/21E/23E/11 & Barrel Handle - HKP-00244-M HK21, HK21E, HK23E, HK11A1 Barrel Handle
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    HK21, HK21E, HK23E, HK11A1 Barrel Handle

    Michaels Machines

    $74.95
    HK 21, 21E, 23E, HK11 Barrel Handle US-made barrel handle.  A great alternative for the original barrel handles that are no longer in production. Available in black or OD green and compatible with 5.56 and .308 platforms. Compatible...
    HKP-00244-M
    $74.95
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  • Used - H&K 91/G3 (7.62x51/.308) Fixed Stock with Enhanced Heavy Buffer - OD Green - Surplus - HKP-18932 HK91, G3 Fixed Buttstock with Enhanced Heavy Buffer - OD Green - Surplus
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    HK91, G3 Fixed Buttstock with Enhanced Heavy Buffer - OD Green - Surplus

    H&K Heckler & Koch

    $129.95
    HK 91, G3 Fixed Stock with Enhanced Heavy Buffer Installed - OD Green - Surplus Used Olive Drab green German surplus stock complete with Enhance DMR buffer installed. Ready to drop in on your HK or clone rifle. Used in perfect working condition. Each...
    HKP-18932
    $129.95
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