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 P30S, P30SK Safety Lever Detent Pin
H&K Heckler & Koch
$16.95H&K P30S/P30SK Safety Lever Detent Pin Detent pin for the manual safety mechanism on P30S and P30SK models. Compatible With: HK P30S HK P30SKHKP-21988$16.95 -
On Sale
HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A5 Profile
Nefarious Arms
Now: $504.95Was: $594.95Nefarious 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-21873Now: $504.95Was: $594.95 -
On Sale
CQT FX Simunition Conversion Kit for MP5 - 9mm Blue - USED
Simunition
Now: $269.95Was: $319.95CQT FX Simunition Conversion Kit for MP5 - 9mm - Blue - USED SHADES OF BLUE MAY VARY The CQT FX Simunition conversion kit is in good condition and comes with original factory packaging. This is your chance to grab one of the last...HKP-99054Now: $269.95Was: $319.95 -
Out Of Stock
Picatinny Optic Mount - 52mm - Skeleton - Aimpoint ACRO
B&T Brugger & Thomet
$148.95B&T 52mm QD Skeleton Mount for Aimpoint ACRO The B&T QD Skeleton Mount for the Aimpoint ACRO offers a 52mm elevated profile for improved sight alignment. It is ideal for night vision setups that require clearance over forward-mounted IR devices...HKP-21860$148.95 -
On Sale
HK MP5 Receiver Flat - 9mm - no Sling Clip
HKP HK Parts
Now: $151.95Was: $189.95HKP HK MP5 9mm Receiver Flat w/o Sling Clip The MP5 9mm receiver flat serves as the foundation for custom MP5 builds. This version does not include a sling clip cutout, offering flexibility for customization. Precision-engineered for compatibility with...HKP-21828Now: $151.95Was: $189.95 -
On Sale
HK MP5K Brace with Direct Fit Adapter - .40 S&W, 10mm
HKP HK Parts
Now: $191.95Was: $239.95HKP HK Parts Brace with Direct Fit Adapter for HK MP5K .40, 10mm Designed to adapt UMP style and SB Tactical braces directly to the 40,10 K platform. Made in the USA and available exclusively at HK Parts Compatible With: MP5K .40, 10mmHKP-21835Now: $191.95Was: $239.95 -
HK53 Parts Kit - Like New
H&K Heckler & Koch
$13,484.95Heckler and Koch HK53 Parts Kit - Like New These HK53 kits are undoubtedly the most pristine kits we have ever come across. Some of these kits were only test fired at the factory. Each de-milled kit includes a factory new sling, like-new...HKP-21780$13,484.95 -
On Sale
B&T Blast Deflector - Rotex IIA Interface - Glass Breaker
B&T Brugger & Thomet
Now: $251.95Was: $280.00B&T Blast Deflector with Glass Breaker - Rotex IIA Interface B&T blast deflector with glass breaker features a Rotex IIA Interface, designed to work with non-Pro APC223 and APC308 muzzle devices. Compatible With: B&T APC223...HKP-21776Now: $251.95Was: $280.00 -
Out Of Stock
B&T APC Stock or Brace Adapter - Picatinny - 9mm, 10mm, .40 S&W, .45 ACP - No Hydraulic Buffer
B&T Brugger & Thomet
$160.00B&T Picatinny Brace and Stock Adapter - APC9, APC10, APC40, APC45 - Without Hydraulic Buffer The B&T alloy stock and brace adapter for the APC9, APC10, APC40, APC45 features a rear Picatinny interface giving the user a myriad of shouldering...HKP-21759$160.00 -
Out Of Stock
HK G36, SL8 Handguard Eye Bolt - Slings, Bipods
H&K Heckler & Koch
$79.95H&K HK G36/SL8 Sling/Bipod Eye Bolt Factory HK sling and bipod eye bolt for H&K G36 and SL8 rifle models. Steel construction with a durable black finish. Installs easily into the forward portion of the handguard to provide a secure...HKP-21654$79.95 -
Out Of Stock
HK21E, HK23E, PSG1, PTR Extractor
Michaels Machines
$275.95Michaels Machines HK21E, HK23E, PSG1, MSG90 Extractor Replacement extractor for HK21E, HK23E, PSG1, and MSG90 bolt heads. Extractors are a known wear item on these platforms and are no longer produced by HK. The Michaels Machines extractor is a precise,...HKP-21632$275.95 -
On Sale
HK UMP 5 Prong Ported Flash Hider - 5/8x24
HKP HK Parts
Now: $71.95Was: $89.95HKP HK UMP 5 Prong Ported Flash Hider - 5/8x24 5-prong UMP ported flash hider designed for our new UMP 45 parts kit. Not only does it protect exposed threads, it also enhances the appearance of your firearm while delivering flash suppression. Compatible...HKP-21569Now: $71.95Was: $89.95