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 Ambidextrous Sling - Green - USED
H&K Heckler & Koch
Now: $93.95Was: $149.95HK Ambidextrous Sling - Green - USED ONLY 1 UNIT AVAILABLE - AS PICTURED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. This sling is the factory HK Green 1.25" Ambi Sling with dual HK sling hooks...HKP-00183-USEDNow: $93.95Was: $149.95 -
On Sale
HK MP5 Optic Mount - Aimpoint ACRO P-1 - .22 LR
HKP HK Parts
Now: $67.95Was: $98.95HKP - HK MP5 .22LR Optic Mount - ACRO Low-profile mount with a direct Aimpoint ACRO mounting interface. The smallest mount in the market with a sleek and clean overall look. Full co-witness, this mount is the best in the market with the best 3-piece...HKP-99353Now: $67.95Was: $98.95 -
HK416, MR556 A4 Hammer Washer
H&K Heckler & Koch
$58.95Heckler and Koch Hammer Washer for HK MR556 OEM hammer washer for HK MR556 and HK416 rifles. Factory-spec replacement washer for the hammer assembly, ideal for repairs, rebuilds, or returning rifles to original HK configuration. Compatible...HKP-22434$58.95 -
HK CC9 Front Sight - Blacked Out
H&K Heckler & Koch
$23.95Heckler and Koch Blacked Out Front Sight for HK CC9 OEM steel front sight for the HK CC9 with a solid black-out face with no dot or insert. Compatible With: CC9HKP-22425$23.95 -
On Sale
HK417, MR762 Handguard - 15" - Tropentarn
H&K Heckler & Koch
Now: $439.95Was: $488.95Heckler and Koch HK MR762 A4 Complete Handguard - Tropentarn - 15" Factory HK handguard with a 12 o’clock Picatinny rail and M-LOK slots at 3, 6, and 9 o’clock for mounting optics and accessories. Includes dual QD sling sockets for...HKP-99326Now: $439.95Was: $488.95 -
On Sale
HK21 Barrel - 17.7" - Threaded 15X1 - 7.62x51 / .308
Michaels Machines
Now: $994.95Was: $1,189.95MM HK21 Barrel - 17.7" - CHF Michael's Machines HK21 barrels are crafted in the US from 41V50 CHF blanks and fully nitrided for optimal corrosion resistance. Barrels come stripped, requiring a flash hider/muzzle device and barrel handle assembly (all...HKP-22332Now: $994.95Was: $1,189.95 -
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 -
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 VP9, VP9L Optic Plate #8 - Holosun 407K, 507K - Red Dot Pistol Mount - BLEMISHED
HKP HK Parts
Now: $33.95Was: $49.95HKP HK VP9/VP9L Optics Plate #8 - Holosun 407K/507K Optic Mount - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED INSTALLATION MARKINGS COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED...HKP-20016-BNow: $33.95Was: $49.95 -
On Sale
HK USC, SL8 Buttstock Screw - USED
H&K Heckler & Koch
Now: $7.95Was: $12.95H&K USC/SL8 (.45 ACP/5.56/.223) Buttstock Screw - USED ONLY 2 UNITS AVAILABLE - AS PICTURED 1 SCREW PER ORDER - SOLD INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL...HKP-01649-BNow: $7.95Was: $12.95 -
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