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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On Sale
HK416, MR556 Muzzle Device - Assault - Closed Tine - 1/2x28
B&T Brugger & Thomet
Now: $98.10Was: $109.00B&T Assault Closed Tine Muzzle Device - HK416/MR556 - 1/2x28 Factory B&T 1/2x28 flash hider and suppressor adapter for 5.56 rifles. Includes: ROTEX flash hiderHKP-22217Now: $98.10Was: $109.00 -
HK CC9 Extractor
H&K Heckler & Koch
$19.95H&K CC9 Extractor Replacement extractor for the CC9 pistol. Removes spent casings and functions as a visual and tactile loaded chamber indicator.HKP-22129$19.95 -
HK CC9 Magazine Catch Spring
H&K Heckler & Koch
$5.95Heckler and Koch Magazine Catch Spring for HK CC9 This authentic CC9 magazine catch spring applies tension to tHKP-22107$5.95 -
On Sale
HK416 A5, MR556 A3 Barrel Nut
Nefarious Arms
Now: $35.96Was: $39.95Nefarious Arms HK MR556 A3/416 A5 Barrel Nut Whether replacing a barrel nut or sourcing the best parts for your build, the Nefarious MR556/416 barrel nut is an excellent option. Meticulously crafted...HKP-22082Now: $35.96Was: $39.95 -
HK USP Magazine Extension - 9mm - +7 Round
HKP HK Parts
$44.59 - $69.95HK Parts Magazine Extension for your HK USP or HK USPT 9mm +7 Magazine Extension Easy to install. Simply add the mag extension to your existing mag body and follower. No gunsmithing required. Made...HKP-21841-M$44.59 - $69.95 -
On Sale
HK MP5 Dual Folding Stock with Adapter - 9mm
HKP HK Parts / Strike Industries
$203.97 - $319.95HKP HK Parts and Strike Industries 9mm Dual Folding Stock with Adapter for HK MP5 The Strike Industries Dual Folding Stock paired with the HKP MP5 picatinny adapter is one of the best options on...HKP-21768-M$203.97 - $319.95 -
On Sale
HK UMP Flash Hider - Birdcage Style - 5/8x24
HKP HK Parts
Now: $31.84Was: $49.95HKP HK UMP Flash Hider - Birdcage Style - 5/8x24 We are pleased to present the HKP UMP birdcage flash hider, designed specifically for our UMP 45 parts kit. This exceptional accessory not only...HKP-21579Now: $31.84Was: $49.95 -
On Sale
HK MP5 Alpha Folding Stock With Direct Fit Adapter
MI Midwest Industries
$267.72 - $293.97MI/HKP HK MP5 Alpha Folding Brace/Stock Adapter The Midwest Industries Alpha folding stock paired with the HK Parts Picatinny rail adapter offers unparalleled versatility. Adjust your length of pull,...HKP-21512-M$267.72 - $293.97 -
On Sale
HK MP5, MP5K Stock and Dual Folding Adapter - Picatinny
Strike Industries
Now: $179.96Was: $199.95Strike Industries Dual Folding Stock This Strike Industries stock is ideal for MP5 or MP5K platforms featuring a 1913 Picatinny rail interface. Conveniently compatible with any platform featuring a...HKP-21306Now: $179.96Was: $199.95 -
Out Of Stock
HK UMP Stock Block B Push Pin
HKP HK Parts
$34.95Stock Block B Sling Pin With Loop washer & Quick Pull Pin for UMP/USC (.40 S&W/ .45 ACP/9mm)HKP-21249$34.95 -
On Sale
HK G3 .22 20 Round Conversion Magazine - USED
Now: $179.96Was: $199.95HK G3 .22 20 Round Conversion Magazine - USED HK .22 caliber conversion kit 20-round magazine for The G3/91. Ideal for those that have the caliber conversion kit and wants to stack up on spare...HKP-20750Now: $179.96Was: $199.95 -
Out Of Stock
HK Mark 23 Thread Cap - .45 ACP - Threaded 16x1 RH
HKP HK Parts
$44.95H&K Mark 23 .45 ACP Thread Cap - Threaded 16x1 RHHKP-20609$44.95