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
HK MP5SF Bushing Sleeve - Elbow Spring with roller - USED
H&K Heckler & Koch
Now: $2.96Was: $5.95HK MP5SF Bushing Sleeve - Elbow Spring with roller - USED VARYING CONDITION SHOWN - SOLD INDIVIDUALLY USED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. Features: Precision-machined elbow spring...HKP-03330-USEDNow: $2.96Was: $5.95 -
On Sale
HK UMP Flash Hider - Birdcage Style - 5/8x24
HKP HK Parts
Now: $39.95Was: $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 protects exposed threads but also enhances the overall...HKP-21579Now: $39.95Was: $49.95 -
On Sale
HK G36, HK33 Muzzle Device- RRD-360 - Threaded 15x1
JMAC Customs
Now: $77.95Was: $99.95JMAC 5.56 / .223 Muzzle Device Threaded 15x1 for HK G36 and HK33 The RRD-360 Muzzle Device from JMAC Customs is unlike others on the market today. This device vents gasses 360 degrees away from your muzzle requiring less effort from the...HKP-21258Now: $77.95Was: $99.95 -
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 VP9 Match Barrel - 9mm - 6.1" - Threaded 13.5x1 LH
RCM
Now: $222.95Was: $262.50RCM HK VP9 Match 9mm Barrel - Threaded 13.5x1 LH RCM threaded match barrel for the HK VP9 Match. Machined from fully heat-treated 4140 ordnance-grade steel and finished inside and out with a nitrided surface for durability and corrosion resistance. This...HKP-21068Now: $222.95Was: $262.50 -
On Sale
Full Port Muzzle Brake - 6.5mm - Threaded 5/8x24" - Titanium
Tactical Precision MFG
Now: $42.95Was: $84.99TPM 6.5mm Titanium Full Port Muzzle Brake - Threaded 5/8x24 This lightweight titanium muzzle brake is designed by a master gunsmith and is one of the best on the market. The spiral port outlets along with the parabolic internal taper significantly...HKP-20768Now: $42.95Was: $84.99 -
HK G3 .22 20 Round Conversion Magazine - USED
$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 magazines. Condition is used to like new in the gray paint...HKP-20750$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 RH Introducing the new US HK Mark 23 SOCOM Thread Protector, designed for all H&K Mark 23/SOCOM barrels threaded 16x1 RH. This essential accessory protects your valuable threaded barrel and...HKP-20609$44.95 -
On Sale
HK VP9 Tri-Mag Pouch - Single - PLM
Comp-Tac
Now: $35.95Was: $39.95Comp-Tac VP9 Single Tri-Mag Pouch - PLM The Tri-Mag single is an easy way to carry a spare magazine pouch. The Tri-Mag single comes in two different configurations: with a push-button locking mount (PLM) or with a secure quick release (SQR) molle mount...HKP-20358Now: $35.95Was: $39.95 -
HK416, MR556 Handguard - 9" - M-LOK
H&K Heckler & Koch
$244.95H&K HK MR556/HK 416 9" M-LOK Handguard - Black New HK German manufactured forearm for the HK 416 and MR556 firearm. Comes exactly as pictured. Compatible With: HK MR556 HK 416HKP-19670$244.95 -
Out Of Stock
HK UMP 2 Position Lower Grip Frame
HKP HK Parts
$179.95UMP - 2 Position Lower Grip Frame New UMP Lower. 2 position settings (S,F). Perfect for all your own internals. This item is ideal for the USC to UMP conversion or to keep as a spare. Each lower fits & works with the 45, 40 & 9mm calibers using...HKP-19382$179.95 -
On Sale
HK G36, G36C, G36K Magwell
HKP HK Parts
Now: $39.95Was: $49.95Magazine Well - Magwell FDE & RAL8K - HK G36 Allows use of all factory G36 and Magpul G36 magazines. This magwell fits all 30, 10, and 100 round magazines and drums. Compatible With: G36, G36K, G36C In-spec clones and custom buildsHKP-19300-MNow: $39.95Was: $49.95