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 Replacement Buffer - Folding Stock or End Cap
HKP HK Parts
$3.49HKP MP5 Replacement Buffer for Folding Stock or End Cap Spare replacement buffer for choate folding stocks or end caps. Compatible With: ChoateHKP-18735-M$3.49 -
On Sale
HK MP5 .22 Magazine Spring - 25 Round
HKP HK Parts
Now: $3.16Was: $3.9525 Round HK MP5 .22 Magazine Spring A good supply of spare mag springs is a must. These are ideal to have on hand as the spring can become damaged or worn out. Please note: This spring can be...HKP-02786Now: $3.16Was: $3.95 -
Out Of Stock
HK MP5, HK416 Barrel Adapter - .22LR - Converts Thread 8x.75 to 1/2x28
USA
$29.95HK/Walther/Colt .22LR Threaded Barrel Adapter - Converts 8x.75 To 1/2x28 This custom adapter allows you to easily convert your .22LR barrel from 8x.75 to 1/2x28 threads. It replaces the stock flash...HKP-01845$29.95 -
On Sale
HK MP5, SP5 Stabilizing Pistol Brace
SB Tactical
Now: $239.36Was: $265.95SB Tactical HK MP5, HK SP5 Retractable Pistol Stabilizing Brace - Black The HK MP5 and HK SP5 pistol stabilizing brace is 3-position fully adjustable pistol brace and is comprised of a billeted...HKP-19161Now: $239.36Was: $265.95 -
On Sale
HK P30L Compensator - Gen 2 - Rail Mount - 9mm, .40 S&W - Red
HKP HK Parts
Now: $99.95Was: $184.95HKP HK P30L 9mm/.40 S&W Gen 2 Rail Mount Compensator - Red Crafted from aircraft grade billet aluminum and finished with a durable Cerakote coating, this compensator is designed to seamlessly...HKP-19067-RENow: $99.95Was: $184.95 -
HK VP9, P30 Magazine - 15 Round - 9mm
H&K Heckler & Koch
$49.95HK VP9, VP9L & P30, P30L, P30S 9mm - 15 Round Magazine New HK German manufacture and factory fresh production. Each factory HK all-steel-bodied magazine holds 15 rounds of 9mm ammunition for use in...HKP-00305-M$49.95 -
Out Of Stock
HK417, MR762 Magazine - 20 Round
H&K Heckler & Koch
$69.95Heckler and Koch HK MR762 and HK417 - 20 Round Magazine This is the factory OEM magazine for the new HK 7.62 X 51mm rifles. It is the highest magazine capacity available for the HK MR762 and HK417...HKP-01700$69.95 -
HK VP9, VP9L Optic Plate Screw
HKP HK Parts
$1.95Replacement Screw For VP9, VP9L Optics Plate & Optics Filler Cover Torx head plus T20 steel replacement screw for any HK German or USA made VP9 optics ready slide filler plate or optics plate. **Each...HKP-19709$1.95 -
On Sale
M-LOK Vertical Foregrip - Short
HKP HK Parts
Now: $19.96Was: $24.95HKP Universal M-LOK Short Grip Short vertical grip for M-LOK. This grip is by far the nicest shorter style or stubby grip we have encountered for the money. This rock solid grip is a must have for...HKP-20681Now: $19.96Was: $24.95 -
HK USP Magazine - .45 ACP - 12 Round - Extended Floorplate - Red Follower
H&K Heckler & Koch
$64.95HK German Production USP .45 - 12 Round Magazine - Red Follower Compatible With: HK USP .45 Full-Size Pistols HK USP 45 Tactical USP Expert, UHKP-21418$64.95 -
On Sale
HK MP5 Handguard - MLOK
MI Midwest Industries
Now: $130.46Was: $144.95MI MP5 M-LOK Forearm Compatible professional grade one piece design Simple installation, include all tools Mil-spec top rail. Features 15 full and 5 half M-LOK slots. Features two anti-rotation QD...HKP-18472Now: $130.46Was: $144.95 -
Out Of Stock
HK VP9, P30 15 Round to 17 Round Magazine Conversion Kit
H&K Heckler & Koch
$34.95HK Magazine Conversion Kit - VP9/P30 - 15 round to 17 round Factory OEM German HK Magazine Upgrade Conversion Kit that allows the end user to convert an existing VP9/P30 15 round magazine...HKP-19715$34.95