Small Parts

Small Parts

Explore our extensive selection of HK small parts at HKParts, perfect for repairs, upgrades, and custom builds. Our inventory includes high-quality, precision-machined replacement parts and maintenance kits designed for a wide range of HK models. Whether you need push pins, springs, or custom components, our HK-specific small parts ensure optimal performance and durability for your firearm.

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  • New - H&K HK USP/USPC/45/45C LEM Cocking Piece - HKP-02509
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    HK45, HK45 Compact, HK USP, USP Compact LEM Cocking Piece

    H&K Heckler & Koch

    $69.95
    HK USP/USPC/45/45C LEM Cocking Piece Compatible With All The Following LEM Models: USP Full Size USP Compacts HK45C HK45
    HKP-02509
    $69.95
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    Qty in Cart: 0
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    $69.95
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  • New - H&K HK G36 Piston Rod Plate - HKP-01871
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    HK G36 Rod Plate - Gas Piston

    H&K Heckler & Koch

    $7.95
    HK G36 Piston Rod Plate
    HKP-01871
    $7.95
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    $7.95
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  • Out Of Stock
    New - H&K G36/SL8 Dual/Single Optic Front Sight Screw - Extended - HKP-00801

    HK G36, SL8 Front Sight Screw - Dual and Single Optics - Extended

    H&K Heckler & Koch

    $9.95
    Dual/Single Optic Longer Front Sight Screw - HK German HK German manufacturer. This is a required part if you want to install either the dual or single optic.   Compatible With: HK G36 HK SL8
    HKP-00801
    $9.95
    Out Of Stock
    Qty in Cart: 0
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    $9.95
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  • New - H&K MP5 A3 Retractable Buttstock Release Lever - HKP-16404 HK MP5 Release Lever - A3 Retractable Buttstock
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    HK MP5 Release Lever - A3 Retractable Buttstock

    H&K Heckler & Koch

    $19.95
    HK MP5 A3 Retractable Buttstock Release Lever For use with the newer Navy or F style A3 retractable MP5 stocks. Not for use on the older 1st generation metal levered MP5 stocks. This lever is much easier to break than the older style and a must have item...
    HKP-16404
    $19.95
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    $19.95
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  • On Sale
    HK Handguard Sling Pin - Ambi - Small - USED HK Handguard Sling Pin - Ambi - Small - USED
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    HK Handguard Sling Pin - Ambi - Small - USED

    H&K Heckler & Koch

    Now: $42.95
    Was: $61.95
    HK Handguard Sling Pin - Ambi - Small - USED VARYING CONDITION SHOWN - SOLD INDIVIDUALLY USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. This ambidextrous pin will allow the user to attach a sling hook to...
    HKP-00077-USED
    Now: $42.95
    Was: $61.95
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    Now: $42.95
    Was: $61.95
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  • HK416, HK417, MR556, MR762 Cylindrical Head Screw HK416, HK417, MR556, MR762 Cylindrical Head Screw
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    HK416, HK417, MR556, MR762 Cylindrical Head Screw

    H&K Heckler & Koch

    $19.95
    Heckler and Koch Cylindrical Screw for MR762, HK417, MR556, HK416 Factory replacement cylindrical lens-head Allen screw for maintaining or repairing your HK417 and MR556 rifles with original-spec hardware. Compatible With: HK417, MR762 HK416, MR556
    HKP-22433
    $19.95
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  • On Sale
    HK G3,91,PTR, 93,33 & MP5, 94 Hammer Strut - USED H&K Heckler & Koch HKP-15445-USED HK G3,91,PTR, 93,33 & MP5, 94 Hammer Strut - USED H&K Heckler & Koch HKP-15445-USED
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    HK MP5, HK90 Series Hammer Strut - USED

    H&K Heckler & Koch

    Now: $5.21
    Was: $9.95
    HK MP5, G3, 91, PTR, 93, 33, HK94 Hammer Strut - USED   SOLD INDIVIDUALLY   USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK German Hammer Strut for 90 series rifles and pistols. A perfect...
    HKP-15445-USED
    Now: $5.21
    Was: $9.95
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    Now: $5.21
    Was: $9.95
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  • On Sale
    New - MKE -4 Roller for Bolt Head 7.96mm - Under-sized - HKP-22238 MKE -4 Roller for Bolt Head 7.96mm - Under-sized MKE HKP-22238
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    HK 90 Series Locking Roller for Bolt Head - 7.96mm

    MKE

    Now: $22.95
    Was: $28.95
    MKE -4 Roller for Bolt Head 7.96mm - Under-sized The proper roller size is essential for proper head spacing and bolt gap. Made in Turkey by MKE on HK tooling.  Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the...
    HKP-22238
    Now: $22.95
    Was: $28.95
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    Now: $22.95
    Was: $28.95
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  • Used - H&K G3/91/93/53/33 Anti-Rattle Mag Release - USED - HKP-22061 HK91, G3, HK91, HK33, HK53, HK93 Paddle Mag Release - Anti-Rattle - USED
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    HK91, G3, HK91, HK33, HK53, HK93 Paddle Mag Release - Anti-Rattle - USED

    H&K Heckler & Koch

    $42.95
    H&K G3/91/93/53/33 Anti-Rattle Mag Release - USED This is a used German anti-rattle paddle mag release for installation on all H&K .223 and .308 rifles. Compatible With: HK G3/91 HK 51 HK 93/53/33 HK PSG-1 HK MSG-90 PTR91 Clones and other custom...
    HKP-22061
    $42.95
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    $42.95
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  • New - H&K MR762 A4/417 Magazine Catch - HKP-21961 HK417, MR762A4 Magazine Catch
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    HK417, MR762A4 Magazine Catch

    H&K Heckler & Koch

    $99.95
    H&K MR762 A4/417 Magazine Catch German-made magazine catch for MR762 A4 and HK417. Compatible With: HK MR762 A1/A4 HK417  
    HKP-21961
    $99.95
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    Qty in Cart: 0
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    $99.95
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  • Out Of Stock
    New - B&T APC9 Selector Position Lock Spring - HKP-21764 B&T APC9 Selector Position Lock Spring

    B&T APC9 Selector Position Lock Spring

    B&T Brugger & Thomet

    $4.95
    B&T APC9 Selector Position Lock Spring Compatible With: APC Series Standard receiver Glock receiver Sig receiver
    HKP-21764
    $4.95
    Out Of Stock
    Qty in Cart: 0
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    $4.95
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  • Out Of Stock
    New - H&K HK SL8-1 Clamping Sleve - HKP-16401

    HK SL8-1 Safety Clamping Sleeve

    H&K Heckler & Koch

    $8.95
    H&K HK SL8-1 Clamping Sleve
    HKP-16401
    $8.95
    Out Of Stock
    Qty in Cart: 0
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    $8.95
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