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 VP9/VP9SK, HK VP40 Disassembly Safety - HKP-16792 HK VP9, VP9SK, HK VP40 Disassembly Safety

    HK VP9, VP9SK, HK VP40 Disassembly Safety

    H&K Heckler & Koch

    Now: $12.55
    Was: $13.95
    Dismounting Or Disassembly Safety HK VP9, VP40 Compatible With: HK VP9 HK VP9A1 F HK VP9A1 K HK VP9SK HK VP40
    Now: $12.55
    Was: $13.95
    Out Of Stock
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    Now: $12.55
    Was: $13.95
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  • On Sale
    New - H&K HK MR556/MR762/416/417 Detent Takedown Pin - HKP-02540
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    HK416, HK417, MR556, MR762 Detent Takedown Pin

    H&K Heckler & Koch

    Now: $8.96
    Was: $9.95
    H&K HK MR556/MR762/416/417 Detent Takedown Pin Factory H&K takedown pin for MR556 A4. Compatible With: HK MR556 HK 416 HK MR762 HK 417
    Now: $8.96
    Was: $9.95
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  • New - H&K HK P7 Series Piston Plunger, Detent Spring - HKP-01327
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    HK P7 Series Detent Spring - Piston Plunger

    H&K Heckler & Koch

    $7.95
    HK P7 Series Piston Plunger, Detent Spring   Compatible With: PSP P7M8 P7M10 P7M13
    $7.95
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    $7.95
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  • On Sale
    New - H&K HK USP/45/45C Detent Compression Spring - HKP-01257
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    HK45, HK45 Compact USP Detent Compression Spring

    H&K Heckler & Koch

    Now: $5.36
    Was: $5.95
    HK Slide Detent Compression Spring For All HK USP & HK45, HK45C Models The detent spring is needed for positive de-cocking and safety functions of the detent plate. A spare and replacement part as it is prone to breakage and wear. This is also one of...
    Now: $5.36
    Was: $5.95
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  • On Sale
    New - H&K Burst Trigger Pack Compression Rod Spring - HKP-16199
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    HK90 Series Compression Spring for Shifter Rod on Burst Trigger Packs

    H&K Heckler & Koch

    Now: $9.86
    Was: $10.95
    H&K Burst Trigger Pack Compression Rod Spring Burst pack compression spring for compression rod found in all HK Burst Trigger Packs. This part, along with the compression rod, is the number one most common wear or breakage parts in HK Burst Packs...
    Now: $9.86
    Was: $10.95
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  • On Sale
    New - H&K HK MR556/MR762/416 Bolt Catch Pin - HKP-02677
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    HK416, MR556, MR762 Bolt Catch Pin

    H&K Heckler & Koch

    Now: $4.46
    Was: $4.95
    H&K HK MR556/MR762/416 Bolt Catch Pin The factory roll pin is used to hold the bolt catch in place. Great to have on hand in the event this item becomes lost or damaged when doing maintenance Compatible With: HK MR556 HK 416 HK MR762
    Now: $4.46
    Was: $4.95
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  • On Sale
    Used - H&K German Hammer Spring (5.56/.223 & 7.62x51/.308) - Used - HKP-18066
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    HK German Hammer Spring (5.56/.223 & 7.62x51/.308) - Used

    H&K Heckler & Koch

    Now: $4.46
    Was: $4.95
    HK German Rifle Hammer Spring For All .308 & .223 Semi & Full Auto Trigger Packs The rifle 308/5.56 hammer spring is a popular upgrade in 9mm builds experiencing light primer hits. This is the factory correct 25 lb. weight for positive detonation...
    Now: $4.46
    Was: $4.95
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  • On Sale
    New - H&K 10 Round HK USP .45 ACP Extended Floor Plate - Black - HKP-01281 HK USP Magazine Floorplate - .45 ACP - 10 Round - Extended
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    HK USP Magazine Floorplate - .45 ACP - 10 Round - Extended

    H&K Heckler & Koch

    Now: $11.65
    Was: $12.95
    H&K 10 Round HK USP .45 ACP Extended Floor Plate This is a great part to stock up on as the 10-round tabs are known for breakage, or if you have large hands, the extended floorplate is a must-have upgrade.  Compatible With: HK USP .45 Magazine...
    Now: $11.65
    Was: $12.95
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  • On Sale
    New - German HK 416, MR556 - Barrel Nut - HKP-02535 HK416 A1, MR556 Barrel Nut
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    HK416 A1, MR556 Barrel Nut

    H&K Heckler & Koch

    Now: $48.56
    Was: $53.95
    Heckler and Koch Barrel nut for MR556A1 rifle All steel barrel nut. This item is a must-have repair and replacement part for removal or when you have any work done to your barrel, as the barrel nut may become damaged in the removal and...
    Now: $48.56
    Was: $53.95
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  • On Sale
    New - H&K HK VP9B Mag Release Button Set - S, L, XL - HKP-19746 HK VP9B Mag Release Button Set - S, L, XL
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    HK VP9B Mag Release Button Set - S, L, XL

    H&K Heckler & Koch

    Now: $8.96
    Was: $9.95
    HK VP9B Mag Release Button  - S, L & XL New HK German Manufacture. Will fit the new VP9B button mag release model. A perfect way to customize your mag release fitment. Compatible With: VP9B and VP9LB models only NOT compatible with VP9A1 F,...
    Now: $8.96
    Was: $9.95
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  • On Sale
    New - GSG9 HK G36/SL8 (5.56/.223) Forearm, Lower, Magwell - Push Pin - HKP-18221
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    HK G36, SL8 Locking Push Pin for Handguards, Lowers, Magwells

    GSG9

    Now: $17.05
    Was: $18.95
    HK G36, SL8 Push Pin For Forearm, Magwell, & Lower  Each push pin/locking pin retains the forearm, magwell, & lower to the upper receiver. Each G36 style firearm uses a total of 3X of these push pins. Compatible With: G36 G36K G36C G36...
    Now: $17.05
    Was: $18.95
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  • Out Of Stock
    On Sale
    New - HK Rifle Tac Latch - HK 91, G3, HK 93, 33 - HKP-02791 HK33, G3 Rifle Tac Latch

    HK33, G3 Rifle Tac Latch

    Now: $62.96
    Was: $69.95
    HK Rifle Tac Latch For HK 91, G3, HK 93, & 33 HK's were designed to have a quick one-handed release capability for the magazine (paddle mag release). However, the semi-auto versions eliminated this much-needed feature due to import restrictions...
    Now: $62.96
    Was: $69.95
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    Now: $62.96
    Was: $69.95
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