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 G3, HK417, HK33, HK53, HK93 Flash Hider - 5/8x24 - Plan B Taper Mount
JMAC Customs
$116.955/8x24 - Plan B Taper Mount Flash Hider for HK G3, HK417, HK33, HK53, HK93 The 360HD is the latest evolution in JMac Custom's Recoil Reduction Device (RRD) family of muzzle brakes, designed to meet the needs of serious shooters...HKP-22412$116.95 -
Rail Panel Cover - M-LOK - 3 Slot
JMK
$18.95 - $23.95Rail Panel Cover - M-LOK - 3 Slot JMK M-LOK rail panels are compatible with platforms featuring M-LOK slots. These modular panels are suited for numerous applications. Each panel is sold individually. M-LOK panels are CNC-machined from solid walnut...HKP-22403-M$18.95 - $23.95 -
On Sale
HK416, MR556 CQC Pistol Grip - Walnut
JMK
Now: $59.96Was: $78.95JMK HK416, MR556 CQC pistol grip - Walnut The CQC pistol grip by JMK is crafted from CNC-machined black walnut. After machining, the grip is dyed to a uniform color and finished with a catalyzed satin seal. These grips are compatible with any firearm...HKP-22401-MNow: $59.96Was: $78.95 -
HK FMP G3 Early Type De-Milled Front End - No Cocking Handle Assembly
FMP HK CONTRACT
$68.95HK G3 - FMP Early Type De-milled Front End - No Cocking Handle Assembly Early style G3 front end with no hanger from de-milled FMP G3 parts kits. Perfect for custom builds. Includes: Cocking tube Trunnion Barrel pinHKP-22377$68.95 -
HK416, MR556 Handguard - 12.5" - M-LOK - Tropentarn
H&K Heckler & Koch
$488.95H&K HK MR556/HK 416 12.5" M-LOK Handguard - Tropentarn New HK German manufactured handguard for the HK 416 and MR556 firearm. ONLY 3 AVAILABLE Compatible With: HK MR556 HK 416HKP-99327$488.95 -
On Sale
HK417 Bolt Carrier - Full Auto
H&K Heckler & Koch
Now: $1,669.95Was: $1,859.95H&K HK417 Bolt Carrier - Full Auto Genuine factory full auto HK417 bolt carrier. Although designed for the full auto HK417, the carrier is compatible with MR762 receivers. Limited number available. Compatible With: HK417 HK...HKP-22282Now: $1,669.95Was: $1,859.95 -
Out Of StockOn Sale
HK33K, HK53 Locking Piece #3 - 58 Degree - New Old Stock
H&K Heckler & Koch
Now: $1,449.95Was: $1,949.95Heckler and Koch HK53 Locking Piece #3 - 58 Degree - New Old Stock ONLY 2 UNITS AVAILABLE - AS PICTURED Priced for ONE Locking Piece - Condition Varies by Unit - Sold Individually Rare genuine German HK #3 locking piece. This is the correct factory...HKP-99315Now: $1,449.95Was: $1,949.95 -
HK MP5 Parts Kit - A3 - 10mm / .40 S&W - 3 Round Burst - 4 Position
H&K Heckler & Koch
$4,799.95H&K HK MP5 40/10 A3 - 4 Position 3 Round Burst Parts Kit Genuine German HK MP5 .40 parts kits are becoming increasingly rare, and this setup is a prized find. Featuring the sought-after bolt hold open feature, the 4-position/3-round burst trigger...HKP-22242$4,799.95 -
Out Of Stock
B&T GHM9, GHM45, KH9 Stock Conversion Kit
B&T Brugger & Thomet
$165.00B&T GHM9 Stock Conversion Kit Converts the telescopic brace into a telescopic stock or can be used as a replacement for a damaged unit. Compatible with B&T telescopic braces BT-20517 and BT-20527. Includes: Buttplate Extension...HKP-22229$165.00 -
On Sale
HK MP5 Thread Protector Cap - 10mm / .40 S&W - 14x.75 - USED
H&K Heckler & Koch
Now: $34.95Was: $49.95H&K Heckler & Koch's MP5 40/10 Thread Protector Cap - Threaded 14x.75 - USED ONLY 4 UNITS AVAILABLE - AS PICTURED Priced for ONE cap - Condition Varies by Unit - Each unit Sold INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL...HKP-00422-BNow: $34.95Was: $49.95 -
On Sale
HK MP5 Tactical Weapon Light - USED
B&T Brugger & Thomet
Now: $129.95Was: $299.95B&T HK MP5 Tactical Handguard Weapon Light - USED ONLY 3 UNITS LEFT - VARYING CONDITION SHOWN - SOLD INDIVIDUALLY DOES NOT INCLUDE BATTERIES LED weapon light compatible with B&T TL99 MP5/SP5 handguards. Specifications: High...HKP-99270Now: $129.95Was: $299.95 -
On Sale
Optic Rail - 16 Slot - Peep Sight - USED
FN
Now: $28.95Was: $99.95FN Optic Rail w/ Peep Sight - 16 Slot - USED ONLY 1 UNIT LEFT - AS PICTURED NO MOUNTING SCREWS. Used 16-slot optic rail for FN firearms with a built in peep sight. THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS...HKP-99262Now: $28.95Was: $99.95