Parts
At HK Parts, we offer a wide range of high-quality Heckler and Koch accessories and components for your favorite firearms. Whether you are upgrading a Heckler and Koch pistol or rifle, or building with parts kits, we have you covered. Explore top-rated components for VP9, USP, P30, MP5, MP5K, G36, HK416, and more. From triggers, barrels, and grips to magazines, stocks, and sights, find the parts you need to enhance performance, reliability, and function.
Popular upgrades include match triggers, threaded barrels, compensators, optic plates, and extended magazines. Rifle owners often add enhanced stocks, forearms, and ambidextrous controls.
MP5 and MP5K kits are top sellers, giving shooters authentic components for iconic builds. G36 and HK416 kits are also highly sought after by collectors and professionals alike.
HKP offers the world’s largest H&K-focused catalog, with better availability, faster fulfillment, and expert support compared to general retailers.
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HK21E, HK23E Left Receiver Reinforcement Rail Weldment
H&K Heckler & Koch
$14.95H&K 21E/23E Left Receiver Reinforcement Rail Weldment Genuine German-made weldment for left-side receiver reinforcement rail. Precision-machined using the correct steel and milling for you HK21E or HK23E build. Compatible With: HK21E HK23EHKP-21907$14.95 -
On Sale
HK MP5, HK91, G3, HK33 Cocking Tube End Cap - Incomplete - BLEMISHED
H&K Heckler & Koch
Now: $21.95Was: $39.95H&K Cocking Tube End Cap/Dust Cap - BLEMISHED SOLD INDIVIDUALLY - VARYING CONDITION SHOWN INCOMPLETE COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. This part...HKP-00099-BNow: $21.95Was: $39.95 -
On Sale
HK MP5K Stock or Brace Adapter - .40 S&W, 10mm
HKP HK Parts
Now: $90.95Was: $113.95HKP HK Parts .40S&W and 10mm Brace and Stock Adapter for HK MP5K Easily attach your favorite A2 style stock to your MP5K 40, 10 with this durable, precision-engineered adapter. Made in the US and available exclusively at HK Parts. Compatible...HKP-21869Now: $90.95Was: $113.95 -
HK MR556 Barrel - 5.56 / .223 - 16" - Complete Upper
H&K Heckler & Koch
$989.95HK MR556 16" Complete Upper Barrel Factory HK MR556 16" barrel, complete with a factory-installed barrel nut, gas block and flash hider. Every component is brand new and meticulously crafted, guaranteeing top-notch quality. This barrel is the ultimate...HKP-21805$989.95 -
On Sale
HK G3 Brass Catcher
B&T Brugger & Thomet
Now: $297.95Was: $385.00B&T HK G3 Brass Catcher THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS FINAL. Mounts to B&T tri-rail handguard (BT-21042) which is no longer available from B&T. The B&T HK G3 brass catcher is a...HKP-21703Now: $297.95Was: $385.00 -
Out Of Stock
Aimpoint Micro T1, T2 20.4mm Spacer
B&T Brugger & Thomet
$91.00Aimpoint Micro T1, T2 20.4mm Spacer 20.4mm riser for Aimpoint T1 and T2 optics. Simply remove your T1 or T2 from the current mount and insert this spacer to raise your optic 20.4mm. Great for dialing in that cowitness or check weld.HKP-21682$91.00 -
On Sale
HK SL8 to G36 Stock Block - Conversion - Sling Pin - Picatinny Rail - BLEMISHED
HKP HK Parts
Now: $68.95Was: $129.95HKP HK SL8/G36 Conversion Stock Block with Picatinny Rail - BLEMISHED INSTALLATION MARKINGS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. SL8 to...HKP-21574-FDE-BNow: $68.95Was: $129.95 -
On Sale
HK VP40, USP, P2000, P30 Flash Hider - 4 Prong - Threaded 14.5x1 LH
USA
Now: $43.95Was: $79.95USA Made .40 S&W 4 Prong Flash Hider - 14.5x1 LH THIS IS A CLOSEOUT PRODUCT DUE TO A HARMONIC (TUNING FORK EFFECT) PRESENT WHEN SHOOTING. THE PART IS ENTIRELY FUNCTIONAL AND IS SOLD AS-IS, RETURNS WILL NOT BE ACCEPTED. For use on all HK German ...HKP-21445Now: $43.95Was: $79.95 -
On Sale
HK MP5K Barrel - 10mm - Threaded 14x.75 with 3 Lug
RCM
Now: $223.95Was: $279.95RCM HK MP5K 10mm Barrel - Threaded 14x.75 Upgrade your MP5K with the RCM HK MP5K 10mm Barrel, featuring a precise 14x1.75 threading for optimal accessory compatibility. Expertly crafted to enhance performance and reliability, this barrel is perfect for...HKP-21155Now: $223.95Was: $279.95 -
Out Of Stock
HK11 LMG 7.62×51mm NATO Parts Kit
H&K Heckler & Koch
$0.00H&K HK11 LMG 7.62×51mm NATO Parts Kit HK 11 Parts Kit 7.62x51mm demilled to BATFE specs with 2 spare G3 aluminum magazines. The HK11 was built during the 70’s and 80’s. These are interchangeable with other HK Variants and can be...HKP-20912$0.00 -
On Sale
Bolt Knob - Acorn - Bronze
Tactical Precision MFG
Now: $19.95Was: $37.99TPM Acorn Bolt Knob – Bronze These bolt knobs can dress up any rifle with a 5/16×24 threaded bolt handle. Specifications: Dimensions:1.5″ x 7/8″ x 7/8″ Weight: 2 oz. Threading: 5/16x24HKP-20904Now: $19.95Was: $37.99 -
On Sale
Remington 700 - 30 MOA - Scope Base Long Action
Tactical Precision MFG
Now: $35.95Was: $76.99TPM Remington 700 Scope Base Long Action 30 MOA These tight tolerance, bomb proof scope rail allow the shooter to make best use of the scope's elevation adjustment for those long-range shots and engagements with 30 MOA options and will match factory...HKP-20760Now: $35.95Was: $76.99