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 MP5, SP5 Barrel - 9mm - 3 Lug - New Old Stock - Rare
H&K Heckler & Koch
$987.95H&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 -
On Sale
HK MP5, SP5, G36 Helmet Stock Cheek Support
B&T Brugger & Thomet
Now: $150.95Was: $168.00B&T Brugger and Thomet Helmet Stock Cheek Support for HK MP5, HK SP5, and HK G36 B&T cheek support for B&T helmet stocks. Compatible With: MP5, MP5K SP5, SP5K G36HKP-21684Now: $150.95Was: $168.00 -
On Sale
HK MP5 Barrel - .40 S&W - 8.85" - Threaded 14x.75 with 3 Lug
RCM
Now: $223.95Was: $279.95RCM 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-21582Now: $223.95Was: $279.95 -
On Sale
HK91, G3 Blast Can - Threaded 5/8x24
MI Midwest Industries
Now: $30.95Was: $38.95MI 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-21536Now: $30.95Was: $38.95 -
On Sale
HK91, G3 Flash Hider for M.A.R.S Suppressor - Threaded 15x1 RH
B&T Brugger & Thomet
Now: $87.95Was: $109.95B&T Brugger and Thomet Flash Hider for M.A.R.S Suppressor, Threaded 15x1 RH for HK91 and HK G3 7.62x51 / .308 Specifications: Made in Switzerland Threaded 15x1 RH Does not include face shims Compatible With: HK91, G3, PTR HK417, MR762 HK PSG1 7...HKP-21518Now: $87.95Was: $109.95 -
HK23E, HK21E Rear Sight Base
H&K Heckler & Koch
$193.95Heckler 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 HK23EHKP-21508$193.95 -
HK MP5 Parts Kit - Tactical Package
HKP HK Parts / Heckler & Koch
$2,199.95HKP MP5 Parts Kit Tactical package Vintage flavor with modern flare. Our team set out to strike a symbiotic balance of classic MP5 with modern accessories delivered at an affordable price. The result is a build kit comprised of vetted components...HKP-21495$2,199.95 -
On Sale
Vector Arms V51 Fixed Stock
HKP HK Parts
$223.95 - $251.95H&K / HKP V51 Fixed Stock HK Parts A2 style stocks for the Vector V51 platform. We start with a like-new backplate and convert it into a V51 collapsible style and pair it with a like-new, hand-picked stock. The result, a complete A2 stock that...HKP-21270-M$223.95 - $251.95 -
HK MP5KSD Rubber Grip Only - Barrel Shroud Handguard
HKP HK Parts
$179.95HK Parts replacement rubber grip for HK MP5KSD Barrel Shroud and Handguard (Rubber Grip Only) Perfect size handguard to pair with the HKP MP5K SD shrouds. Engages perfectly on the machined lugs of our MP5K SD shrouds. Available exclusively at HK...HKP-20951$179.95 -
On Sale
.30 Cal Muzzle Brake - 3 Port - Crush Washer
Tactical Precision MFG
Now: $47.95Was: $72.99TPM Tactical Precision MFG 3 Port .30 Cal Muzzle Brake with Crush Washer This 3 port muzzle brake is made for any 5/8x24 application and comes with a crush washer. Specifications: Dimensions: 2″ x 0.75″ x 0.75″ Weight: 0.67...HKP-20900Now: $47.95Was: $72.99 -
On Sale
Bolt Knob - Acorn - Titanium
Tactical Precision MFG
Now: $24.95Was: $48.99Acorn Bolt Knob The Acorn Bolt knob is the perfect addition for those that want to dress up their rifle. It has a good grip, and they stand out in the crowd. Features: Dimensions: 1.5" x 7/8" x 7/8 Weight: 2 oz. Material: Titanium Threading:...HKP-20761Now: $24.95Was: $48.99 -
On Sale
HK VP9SK Holster - Crusader Max - Right Hand
Victory Operational Works
Now: $74.95Was: $99.95Victory Operational Works HK VP9SK Crusader Max Holster - Standard - Right Hand The Crusader holster is a modular multi-mission capable holster platform offering two carry options, IWB & OWB including the hardware needed for both configurations. Each...HKP-20307Now: $74.95Was: $99.95