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
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 -
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 - .40 S&W, 10mm - 14x.75 - USED
H&K Heckler & Koch
Now: $34.95Was: $49.95H&K Heckler and Koch's Thread Protector Cap Threaded 14x.75 - USED for MP5 .40, 10 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 -
Out Of Stock
HK416, MR556 Bayonet Adapter - M27 Style
H&K Heckler & Koch
$61.95Heckler and Koch Bayonet Adapter HK416, MR556 for M27 Build OEM bayonet adapter for HK416 and MR556 rifles for M27-style builds. Mounts to the barrel assembly to accept a standard bayonet. Specifications Bayonet adapter only (roll pin sold...HKP-22191$61.95 -
On Sale
HK417, MR762 Extension Nut - Buffer Tube - Castle Receiver - BLEMISHED
H&K Heckler & Koch
Now: $20.95Was: $39.95H&K HK MR762/417 Castle Receiver Extension Nut For Buffer Tube - Black - BLEMISHED ONLY 2 UNITS AVAILABLE - AS PICTURED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES...HKP-16768-BNow: $20.95Was: $39.95 -
HK91, G3 Bolt Carrier - Full Auto - SURPLUS - FMP
H&K Heckler & Koch
$129.95Heckler and Koch's F/A Bolt Carrier for HK G3 and HK91 - FMP - SURPLUS One UNIT ONLY UNIT QUALITY MAY VARY - SEE PHOTOS FOR EXAMPLE OF CONDITION RANGE Used full-auto steel bolt carrier manufactured by FMP on original Heckler and Koch tooling. Compatible...HKP-22160$129.95 -
HK CC9 Slide Release Pin
H&K Heckler & Koch
$5.95H&K CC9 Slide Release Pin Genuine H&K CC9 slide release pin secures the slide release lever to the frame. Compatible With: HK CC9HKP-22121$5.95 -
On Sale
HK MP5 Trigger Housing - FBI 2 Position 0,1 Pictogram - .40 S&W, 10mm - USED - BLEMISHED
H&K Heckler & Koch
Now: $74.95Was: $128.95H&K MP5 40,10 2 Position (0,1 Pictogram) FBI Style Trigger Housing - USED - BLEMISHED CONDITION MAY VARY. SEE PHOTOS. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE...HKP-02696-BNow: $74.95Was: $128.95 -
On Sale
HK MP5 German 0,1,2 Burst Only Housing- Push Pin - USED - BLEMISHED
H&K Heckler & Koch
Now: $119.95Was: $179.95HK MP5 German 0,1,2 Burst Only Housing- Push Pin - USED - BLEMISHED CONDITION MAY VARY - SOLD INDIVIDUALLY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL...HKP-01015-BNow: $119.95Was: $179.95