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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HK MP7, G36, SL8 Gas Block Pin
H&K Heckler & Koch
$8.95H&K HK G36/SL8/MP7 Gas Block Pin The G36/SL8/MP7 gas block pin is the largest out of HK's line up (UMP/USC, 415/MR556, 417/MR762).HKP-16727$8.95 -
Out Of Stock
HK SP5 Case Deflector - 9mm, .40 S&W / 10mm
H&K Heckler & Koch
$49.95SP5 Case Deflector - 9/10/40 Factory HK case deflector for the SP5 platform chambered in 9mm, 10mm, and .40 S&W. Compatible With: H&K SP5 9/10/40HKP-02170$49.95 -
HK MP5, SP89, HK91, HK93, HK94 Grip Screw
H&K Heckler & Koch
$8.95H&K Grip Screw New HK grip screw that is now out of production. Great for a spare. Compatible With: HK91 HK93 HK94 SP89HKP-01725$8.95 -
HK -6 Roller For Bolt Head 7.94mm - Under-sized
H&K Heckler & Koch
$27.95H&K -6 Roller For Bolt Head 7.94mm - Under-sized New HK German -6 roller that measures 7.94mm. For use with all HK 90 series firearms. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way...HKP-00342$27.95 -
HK33, HK53, HK93 Retractable Stock - A3 - OD Green
MKE
$259.95MKE HK33/53/93 Retractable Stock - OD GREEN The MKE retractable HK33 buttstock is an easy-to-install retractable stock system designed to deliver superior comfort and reliable weapon control. The simple lock/release system is easy to operate,...HKP-21181$259.95 -
HK SL8, G36 Magazine Release Axle Pin
GSG9
$10.95HK G36 & SL8 Magazine Release Axle - USA Mag release axle for all G36 & SL8 models. A must-have spare part. Made in the USA. Compatible With: G36 G36K G36K SL8 Other custom G36 type buildsHKP-18255$10.95 -
HK MP5K/SP5K 9mm SEF Trigger Housing - Universal
H&K Heckler & Koch
$199.95H&K MP5K/SP5K 9mm SEF Trigger Housing - Universal A one size fits all approach for the MP5K and SP5K style semi-auto shelf. This is the best option for MP5K and SP5K receivers. Easily interchange the lower trigger group assembly without swapping...HKP-20557$199.95 -
HK MP5K, SP89, SP5K Side - Folding Brace and HK Parts Stock or Brace Adapter
SB Tactical
$229.95Side Folding Pistol Stabilizing Brace with HK Parts Adapter - HK MP5K, SP89, SP5K & Clones Side Folding Pistol Stabilizing Brace with HK Parts Adapter. The HK Parts adapter offers a QD attachment point and is made from hard coat anodized aluminum...HKP-19451$229.95 -
Out Of Stock
HK45 Tactical Barrel - .45 ACP - 5.15" - Threaded .578x28 RH
RCM
$250.00RCM HK45 .45 ACP Tactical Barrel - Threaded .578x28 RH HK45 & HK45 Tactical threaded barrel compatible with a variety of flash hiders and sound suppressors. Unlike the factory HK45 Tactical barrel, which has a metric 16x1 LH thread, this barrel...HKP-17446$250.00 -
HK Pistol Field Cleaning Kit - .45 ACP
H&K Heckler & Koch
$69.95H&K HK .45 ACP Pistol Field Cleaning Kit This is a genuine HK factory cleaning kit and is recommended by HK for all HK pistol owners. Compatible With: HK45, HK45 Tactical HK45C, HK45C Tactical USP 45, USP 45 Tactical USPC 45, USPC...HKP-01245$69.95 -
HK416, MR556 Castle Nut
H&K Heckler & Koch
$34.95H&K HK MR556/416 Castle Nut For Buffer Tube New HK German manufacture. This buffer tube castle nut will fit both mil-spec and commercial buffer tubes. All steel manufacture. With HK round tool attachment points as well as traditional wrench...HKP-15230$34.95 -
HK416, MR556 Firing Pin
H&K Heckler & Koch
$54.95H&K HK MR556/416 Firing Pin New HK German manufactured. This is a great item to have on hand as the firing pin is one of the most abused components in the HK MR556 and HK 416 weapon systems. Compatible With: HK MR556 HK 416 HK CR556 HK...HKP-00045$54.95