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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  • HK416 A5 Front Sight Adapter HK416 A5 Front Sight Adapter
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    HK416 A5 Front Sight Adapter

    H&K Heckler & Koch

    $97.95
    H&K HK416 A5 Front Sight Adapter Designed for secure and precise installation of factory-style front sights. Compatible With: HK 416
    HKP-22204
    $97.95
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    $97.95
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  • HK MR762 A4 Handguard - Complete HK MR762 A4 Handguard - Complete
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    HK MR762 A4 Handguard - Complete

    H&K Heckler & Koch

    $349.95
    Heckler and Koch HK MR762 A4 Complete Handguard Factory HK handguard with a 12 o’clock Picatinny rail and M-LOK slots at 3, 6, and 9 o’clock for mounting optics and accessories. Includes dual QD sling sockets for ambidextrous sling use...
    HKP-21972
    $349.95
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  • Out Of Stock
    On Sale
    Used - H&K 21 (7.62x51/.308) Firing Pin - USED - BLEMISHED - HKP-00546-B

    HK21 Firing Pin - USED - BLEMISHED

    H&K Heckler & Koch

    Now: $39.95
    Was: $79.95
    H&K 21 (7.62x51/.308) Firing Pin - USED - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Compatible With: HK21
    HKP-00546-B
    Now: $39.95
    Was: $79.95
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  • On Sale
    Used - HK G3 Buttpad - USED - HKP-99071 HK G3 Buttpad - USED
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    HK G3 Buttpad - USED

    USA

    Now: $4.95
    Was: $14.95
    HK G3 Buttpad - USED HK G3 buttpad, condition will vary from part-to-part vs. the pictured unit. Compatible With: HK G3 THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE.  SALE IS FINAL.
    HKP-99071
    Now: $4.95
    Was: $14.95
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  • Out Of Stock
    New - Nefarious Arms HK MR556/416 10.4" A5 Barrel - HKP-21873 HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A5 Profile

    HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A5 Profile

    Nefarious Arms

    $594.95
    Nefarious Arms HK MR556416 10.4" A5 Barrel An expertly crafted 10.4" barrel designed for the HK MR556 and 416 platforms. Featuring the A5 profile, this barrel balances durability and weight, making it an excellent choice for both tactical and...
    HKP-21873
    $594.95
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    $594.95
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  • Out Of Stock
    New - B&T Bipod (Polymer) - Picatinny Mount - Rubber Feet - HKP-21773 Picatinny Bipod Mount - Polymer - Rubber Feet

    Picatinny Bipod Mount - Polymer - Rubber Feet

    B&T Brugger & Thomet

    $145.00
    B&T Bipod (Polymer) - Picatinny Mount - Rubber Feet Genuine B&T bipod with NAR adapter (Picatinny mount) for use on any firearm featuring a Picatinny bottom rail. 
    HKP-21773
    $145.00
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    $145.00
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  • On Sale
    HK G36, HK SL8 Side Rail Factory HK - Black - BLEMISHED New - HK G36, HK SL8 Side Rail Factory HK - Black - USED - BLEMISHED - HKP-01962-B
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    HK G36, HK SL8 Side Rail Factory HK - Black - BLEMISHED

    H&K Heckler & Koch

    Now: $34.95
    Was: $67.95
    HK G36, HK SL8 Side Rail Factory HK - Black - BLEMISHED SCRATCHES. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Up to two side rails can be used on a G36 UMP,...
    HKP-01962-B
    Now: $34.95
    Was: $67.95
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  • New - H&K HK MP5/SP5 3 Lug Barrel - New Old Stock - Rare - HKP-21662 HK MP5, SP5 Barrel - 9mm - 3 Lug - New Old Stock - Rare
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    HK MP5, SP5 Barrel - 9mm - 3 Lug - New Old Stock - Rare

    H&K Heckler & Koch

    $987.95
    H&K HK MP5/SP5 3 Lug Barrel - New Old Stock - Rare Factory German date coded with H&K logo. This new old stock 3-lug item is incredibly rare and in pristine condition. An absolute gem in the market. We only have a limited number available, and...
    HKP-21662
    $987.95
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    $987.95
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  • New - RCM HK MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug - HKP-21582 HK MP5 Barrel - .40 S&W - 8.85" - Threaded 14x.75 with 3 Lug
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    HK MP5 Barrel - .40 S&W - 8.85" - Threaded 14x.75 with 3 Lug

    RCM

    $279.95
    RCM HK MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug This is the ultimate US-made barrel for any new or conversion build for the MP5 .40 cal. Crafted from top-grade CHF 41v40 material, it’s machined to impeccable standards. With the correct...
    HKP-21582
    $279.95
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  • New - MI Blast Can 5/8-24 Thread - HKP-21536 HK91, G3 Blast Can - Threaded 5/8x24
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    HK91, G3 Blast Can - Threaded 5/8x24

    MI Midwest Industries

    $38.95
    MI Blast Can 5/8x24 Thread Specifications: Directs muzzle blast forward on short barrel rifles and pistols. Does not reduce recoil or flash. Constructed from 6061 aluminum, and hardcoat anodized for a lifetime of service 5/8x24 Thread for .30...
    HKP-21536
    $38.95
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    $38.95
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  • HK23E, HK21E Rear Sight Base HK23E, HK21E Rear Sight Base
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    HK23E, HK21E Rear Sight Base

    H&K Heckler & Koch

    $193.95
    Heckler and Koch Rear Sight Base HK21E and HK23E  Genuine HK German rear site base.  Requires post installation machining to accommodate a scope. Compatible With: HK21E HK23E
    HKP-21508
    $193.95
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    $193.95
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  • On Sale
    New - Magpul HK MP5K AR 9mm Navy Style Match Trigger Group - HKP-21378 HK MP5K Trigger Group - 9mm - Navy Style with AR Grip and Match Trigger
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    HK MP5K Trigger Group - 9mm - Navy Style with AR Grip and Match Trigger

    Magpul

    Now: $519.95
    Was: $649.95
    Magpul HK MP5K AR 9mm Navy Style Match Trigger Group Our improved HK-AR Navy ambidextrous lower housing is now paired with our match trigger pack and a Magpul MOE grip to make this complete MP5K-AR style match trigger group. This trigger group is a...
    HKP-21378-M
    Now: $519.95
    Was: $649.95
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    Now: $519.95
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