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 USP Detent Plate - V1, V2
H&K Heckler & Koch
$13.95H&K USP V1/V2 Detent Plate Detent plate for full-size USP pistols. Used to convert or configure the pistol to Variant 1 (left-side safety/decocker) or Variant 2 (right-side safety/decocker). Ideal for users customizing their control layout...HKP-21982$13.95 -
On Sale
HK MP5 Trunnion - Gunsmith Special
USA
Now: $24.95Was: $54.95HK MP5 Trunnion - Gunsmith Special US made HK MP5 trunnions sold as-is. Will require work before being functional. We recommend the work be performed by a professional gunsmith. The condition will vary from part-to-part vs. the pictured unit. Compatible...HKP-99089Now: $24.95Was: $54.95 -
HK MP5K Pistol Stabilizing Brace - SBA5
SB Tactical
$248.95SB Tactical HK MP5K SBA5 Pistol Stabilizing Brace SB Tactical combined with our MP5K end cap creates a true drop-in brace, perfect for those seeking the flexibility that the SBA5 pistol stabilizing brace offers. With a 5-position adjustable length, this...HKP-21795-M$248.95 -
On Sale
HK MP5 QD End Cap with Buffer - Black - BLEMISHED
HKP HK Parts
Now: $49.95Was: $99.95HK MP5 QD End Cap with Buffer - Black - BLEMISHED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. With this MP5 QD end cap upgrade you will get a heavier buffer...HKP-20118-BNow: $49.95Was: $99.95 -
Out Of Stock
BT-20506, 20411 - GHM9, GHM45, KH9 Brace Conversion Kit
B&T Brugger & Thomet
$130.00Brace Conversion Kit for BT-20506/20411(GHM9/GHM45/KH9) Easily convert your B&T folding stock into a brace-compatible setup with this precision Brace Conversion Kit, designed for use with BT-20506 and BT-20411 stock assemblies. This kit enables...HKP-21736$130.00 -
HK416 A5 Flash Hider - .22 LR
HKP HK Parts
$59.95HKP HK 416 .22 LR A5 Flash Hider Our HK Parts A5 flash hider is a directly mounted upgrade that will enhance the appearance of your 416 .22LR build, perfect for those aiming to achieve an authentic A5 style. It comes with an O-ring for secure attachment,...HKP-21575$59.95 -
HK416, MR556, HK417, MR762 Pistol Grip - K2 XL
Magpul
$22.95Magpul Moe K2 XL AR Grip Designed for shooters with larger hands, the K2-XL Grip is similar to the MOE-K2 Grip – AR15/M4 but nearly 25% bigger. A drop-in upgrade for the AR15/M4, it offers a more vertical grip angle thereby improving comfort...HKP-21554$22.95 -
Out Of StockOn Sale
HK MP5 Optic Mount - Raised - Picatinny - BLEMISHED
HKP HK Parts
Now: $68.95Was: $109.95HKP HK MP5 Picatinny Rail Optic Mount - Raised Mount - BLEMISHED DINGS - INSTALLATION MARKINGS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK Parts Picatinny...HKP-21489-BNow: $68.95Was: $109.95 -
HK VP9, P30 +15 Magazine Extension Kit - Black
HKP HK Parts
$74.95Magazine Extension Kit +15 – Black - HK VP9, HK P30 HK Parts magazine extension +15 kit adds 15 additional rounds to the HK VP9/P30 magazine with the simple swap of the floor plate & high-reliability mag spring. HKP highly recommends...HKP-21340$74.95 -
Out Of Stock
HK Fray Fixed Blade Knife
H&K Heckler & Koch
$169.95Features: • Frame: Black OverMolded Rubber Scales (Includes Black Paracord - 1/8" Diameter)• Tail Jimping: Provides for better traction in reverse grip• Includes Automatic Retention Sheath (1.7 oz weight) Blade:• Style: Clip...HKP-21283$169.95 -
On Sale
Muzzle Brake - Titanium 3 Port .30 Cal
Tactical Precision MFG
Now: $42.95Was: $84.99TPM - Titanium 3 Port Muzzle Brake .30 Cal This radially ported muzzle brake is for Ruger American and many other lightweight mountain rifles. Features: Weight:0.67 oz Material: Grade 5 titanium Color: Black Threading: 5/8x24HKP-20777Now: $42.95Was: $84.99 -
On Sale
HKP Hat - Snapback - Flat Brim - OSFM - Gray and Red
HKP HK Parts
Now: $13.45Was: $19.95HKP Flat Brim Snapback Hat - OSFM - Gray & Red Get your hands on some of our premium hats! Features: Official HKP merchandise 100% cotton Structured 4 sewn eyelets Matching color sweatband Plastic adjustable snap Firm front panel Size: OSFM -...HKP-20718Now: $13.45Was: $19.95