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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Out Of Stock
HK MP5, MP5K Cocking Handle - Extended - Enhanced
HKP HK Parts
$39.95HKP HK MP5, MP5K Extended Cocking Handle - Enhanced Enhanced extended cocking handle for the MP5 & MP5K style of firearms. Designed to also function with UTG monolithic M-LOK handguards. Made from solid steel billet and coated with a salt bath...HKP-18267$39.95 -
HK UMP, USC Picatinny Rail Set - 4 Piece
HKP HK Parts
$149.95HK UMP, USC Rail Set Complete A complete set of rails for your HK UMP/USC featuring an extended top rail for mounting your optic of choice. The rails are scratch resistant, class 3 mil-spec hard coat anodized. Each set includes the top rail, all 3 side...HKP-17429$149.95 -
On Sale
Glock 17 - Magazine Extension Kit - 9mm - +6 Round
HKP HK Parts
Now: $12.91Was: $34.95HKP Glock 17 - +6 Round 9mm Magazine Extension Kit Designed to fit all of the Glock 17 models from Gen 1 through and up to the current Gen 5 models. Each unit is fully machined from a solid billet of aircraft-grade aluminum that is fully hard coat...HKP-18348-MNow: $12.91Was: $34.95 -
HK416 Magazine - .22LR - Gray
Walther
$34.95HK, Umarex, Walther, HK416 .22LR Magazine - 30 Round Magazine This is the factory OEM magazine for all of the models listed. Each magazine comes in charcoal gray color. Compatible With: HK416 .22 Colt M4 .22 HK G36 .22 Beretta ARX 160 ...HKP-01749$34.95 -
HK416, MR556 Gas Block Roll Pin
H&K Heckler & Koch
$5.95Heckler and Koch Gas Block Pin for HK416 and MR556 This is the retaining pin for an HK416 gas block. A must-have, as HK recommends using new pins once they are removed or damaged. Size: 5 x 18 mm.HKP-02534$5.95 -
Out Of Stock
HK91, G3, PTR 20 Round Magazine
KCI
$28.95HK 91, G3, PTR .308 20 Round All Steel Magazine - KCI Designed to fit your G3, HK91, & PTR style firearms chambered in .308 and 7.62x51. This standard capacity 20-round magazine provides reliable and smooth feeding. Constructed of steel with a grey...HKP-19970$28.95 -
Out Of Stock
HK MP5, MP5K Dual Magazine Clamp - 9mm
H&K Heckler & Koch
$129.95HK German MP5, MP5K, SP5, SP5K 9mm Dual Magazine Clamp Genuine HK dual magazine clamp for twice the rounds exactly where you need them. This is also a great way to swap between two different types of ammo, like FMJ and JHPs or super and subsonic...HKP-00083$129.95 -
HK G3 Parts Kit - FMP
FMP HK CONTRACT
$159.95FMP - G3 Parts Kit - With Alloy Mag The G3 has been an iconic battle rifle utilized all over the world and revered as one of the best that H&K has offered. These kits are de-milled G3's that were licensed by H&K and manufactured in Portugal by...HKP-22531$159.95 -
HK MP5 A3 Telescopic Stock Buffer - USA
$7.74MP5 A3 Retractable Stock "H" Buffer For All HK A3 Retractable Stocks The A3 stock buffer is a high-wear and replacement item that needs replacement when torn, cracked, brittle, discolored, and worn. These units are from the same material and durometer as...HKP-14012$7.74 -
HK MP5, MP5K Dual Magazine Clamp - 9mm - HKP
HKP HK Parts
$49.95HKP MP5, MP5K, SP5, SP5K 9mm Dual Magazine Clamp HKP dual magazine clamp for twice the rounds exactly where you need them. This is also a great way to swap between two different types of ammo, like FMJ and JHPs or super and subsonic rounds. ...HKP-21667$49.95 -
Out Of Stock
HK91, G3 Wide Handguard
AC-Unity
$74.95AC-Unity HK G3 Wide Handguard G3 length, black, wide handguard with bipod groove. Perfect fit for your HKG3, HK91, or PTR91 that takes standard G3 length handguards. Includes an inner heat shield to protect your hand. The outer design provides a...HKP-21639$74.95 -
HK USP, USPC Laser - Red
HKP HK Parts
$29.95HKP HK USP/USPC Laser - Red Finally, a laser designed to fit the HK USP & USP Compact Family of firearms without a bulky and expensive adapter. This affordable offering is now available to all HK USP, USP owners. This patent-pending offering is a...HKP-16504$29.95