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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  • On Sale
    New - H&K HK SL8, HK G36 Extended Mag Release - HKP-17720 HK SL8, G36 Magazine Release - Extended
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    HK SL8, G36 Magazine Release - Extended

    H&K Heckler & Koch

    Now: $17.95
    Was: $19.95
    Heckler and Koch Oversized Extended Magazine Release for HK SL8 and HK G36 New HK German HK SL8, HK G36, HK243 extended mag release. A must have upgrade for your HK SL8, SL8 to G36 conversion or G36 firearm. The HK extended magazine release is a...
    HKP-17720
    Now: $17.95
    Was: $19.95
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  • On Sale
    New - H&K HK VP9/P Series Extractor - HKP-01615 HK VP9, P Series Extractor
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    HK VP9, P Series Extractor

    H&K Heckler & Koch

    Now: $49.95
    Was: $54.95
    HK VP9/P Series Extractor Brand new factory HK German with red loaded chamber indicator present. Compatible With: HK VP9, VP9 Tactical, VP9SK HK VP9A1 F, VP9A1 K HK P30, P30L, P30S & P30SK HK P2000 HK P2000SK
    HKP-01615
    Now: $49.95
    Was: $54.95
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  • On Sale
    New - HKP HK MP5 Extended Magazine Release - EMR - Streamline - HKP-22175-M HK MP5 Magazine Release - Extended Streamline - EMR
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    HK MP5 Magazine Release - Extended Streamline - EMR

    HKP HK Parts

    Now: $40.95
    Was: $44.95
    HKP HK Parts Extended Magazine Release - EMR - Streamline for HK MP5   Elevate your paddle style mag release with the streamlined extended mag release. Crafted from a solid billet of aircraft-grade aluminum and featuring a hard anodized finish,...
    HKP-22175-M
    Now: $40.95
    Was: $44.95
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    Now: $40.95
    Was: $44.95
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  • On Sale
    New - H&K HK SEF & Navy 3 Position Trigger Spring - Surplus - HKP-01092
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    HK MP5, HK90 Series Trigger Spring - SEF and Navy - 3 Position - Surplus

    H&K Heckler & Koch

    Now: $4.45
    Was: $4.95
    HK 90 Series SEF & Navy Style Trigger Return Spring - Surplus For HK 90 series (semi or full-auto). This item will fit any NON-burst trigger pack. Compatible With: MP5, MP5K, SP89, & SP5K HK G3, HK91, PTR HK 93, 33, HK33K, & HK53 Other HK 90...
    HKP-01092
    Now: $4.45
    Was: $4.95
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    Now: $4.45
    Was: $4.95
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  • On Sale
    New - HKP MP5K/SP89/SP5K Recoil Rod Assembly - USA - HKP-02169
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    HK MP5K, SP89, SP5K Recoil Rod Assembly - USA

    DTAC Dakota Tactical

    Now: $31.95
    Was: $34.95
    HKP MP5K, SP89, & SP5K Recoil Rod Assembly - USA The new US-made Dakota Tactical recoil rod assembly is completely micro-polished and built of the finest materials. This is a great item to have on hand as a spare part as this is a wear and...
    HKP-02169
    Now: $31.95
    Was: $34.95
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  • On Sale
    New - MKE Trigger Pack Ejector Lever Axle - HKP-22241 MKE Trigger Pack Ejector Lever Axle MKE HKP-22241
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    HK MP5, HK90 Series Ejector Lever Axle

    MKE

    Now: $13.46
    Was: $17.95
    MKE Trigger Pack Ejector Lever Axle Fits all SEF & Ambidextrous style HK trigger packs regardless of caliber. MKE product made on HK tooling.  Fits all of the following 90 series trigger packs: SEF, O,1 Navy Burst
    HKP-22241
    Now: $13.46
    Was: $17.95
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    Was: $17.95
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  • On Sale
    HK MP5, HK94, SP5K Magazine Floorplate - 9mm - US - BLEMISHED HK MP5, HK94, SP5K Magazine Floorplate - 9mm - US - BLEMISHED
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    HK MP5, HK94, SP5K Magazine Floorplate - 9mm - US - BLEMISHED

    USA

    Now: $5.95
    Was: $9.95
    MP5 & MP5K 9mm Magazine Floor Plate - BLEMISHED VARYING CONDITION - SOLD INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART PRICE IS PER MAGAZINE Floorplate - SOLD...
    HKP-17507-B
    Now: $5.95
    Was: $9.95
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  • On Sale
    New - H&K Roller Retainer Plate For Rollers - HKP-00065 HK MP5, HK90 Series Roller Locking Plate - Original Style
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    HK MP5, HK90 Series Roller Locking Plate - Original Style

    H&K Heckler & Koch

    Now: $39.95
    Was: $43.95
    New HK German Roller Retainer Plate for Rollers Original-style roller locking plate.  This item is a common wear item that is great to have on hand as they are one of the top items that break or fail with use. Compatible With: MP5*** MP5K SP89,...
    HKP-00065
    Now: $39.95
    Was: $43.95
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  • On Sale
    New - H&K German Rear Sight Spring - HKP-00146
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    HK Rear Sight Spring - German

    H&K Heckler & Koch

    Now: $4.45
    Was: $4.95
    H&K German Rear Sight Spring HK German rear sight spring for rear diopter sights.
    HKP-00146
    Now: $4.45
    Was: $4.95
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  • On Sale
    Used - H&K Standard Roller 8.00mm - Used - HKP-19374 HK Standard Roller 8.00mm - Used
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    HK Standard Roller 8.00mm - Used

    H&K Heckler & Koch

    Now: $6.95
    Was: $7.95
    8.00mm Standard Size (zero or unmarked) For HK Roller Lock Bolt Head HK spec unmarked 8.00mm roller that will fit all HK bolt heads including HK91/G3, HK93/33/53, HK94, MP5, SP89 all clones and the Cetme & Cetme clones. The best roller on the market...
    HKP-19374
    Now: $6.95
    Was: $7.95
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  • On Sale
    New - H&K 91/G3 (7.62x51/.308) Mag Release Set - HKP-00929 HK91, G3 Magazine Release Set
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    HK91, G3 Magazine Release Set

    H&K Heckler & Koch

    Now: $31.95
    Was: $34.95
    Heckler and Koch Magazine Release Set (Left to Right) for HK91, G3 This HK German manufactured magazine release set for HK .308 pattern rifles consists of 4 pieces. Includes: Magazine Catch Magazine Catch Spring Push Button Clamping Sleeve to retain...
    HKP-00929
    Now: $31.95
    Was: $34.95
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    Now: $31.95
    Was: $34.95
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  • On Sale
    New - H&K UMP/USC (.40 S&W/.45 ACP/9mm) Rear Stock Axle Pin - HKP-00604
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    HK UMP, USC Buttstock Axle Pin

    H&K Heckler & Koch

    Now: $27.95
    Was: $30.95
    HK German UMP Rear Stock Axle Pin This is the HK factory German stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those that are doing the USC to UMP conversion. This is required to attach the stock to the...
    HKP-00604
    Now: $27.95
    Was: $30.95
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    Now: $27.95
    Was: $30.95
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