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 StockOn Sale
HK Mark 23 Slide Release Spring - USED
H&K Heckler & Koch
Now: $9.95Was: $15.99HK Mark 23 Slide Release Spring - USED USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL.HKP-01788-USEDNow: $9.95Was: $15.99 -
HK MR556, MR223 Upper Receiver - BLEMISHED
H&K Heckler & Koch
$695.95HK MR556, MR223 Upper Receiver - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED MISSING FORWARD ASSIST AND GAS PISTON COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE...HKP-16950-BL-B$695.95 -
On Sale
HK416, MR556 Handguard - 12.5" - M-LOK - FDE
H&K Heckler & Koch
Now: $386.95Was: $429.95H&K HK MR556/HK416 12.5" M-LOK Compatible Handguard Manufactured by HK from aircraft grade aluminum with a hard coat anodized finish, this M-LOK handguard is designed for the Heckler & Koch MR556 & HK 416 rifles chambered in 5.56x45mm and ...HKP-99323Now: $386.95Was: $429.95 -
Picatinny Optic Mount Shield - Aimpoint T1, H1 - S.W.O.R.D.S
Frost Defense
$239.95Aimpoint T-1, H-1 Optic Mount - S.W.O.R.D.S - Picatinny Mount The S.W.O.R.D.S Enhanced optic shield designed for Aimpoint T1, H1 red dot sights. This patent-pending mount system provides robust glare and impact protection by surrounding the ocular and...HKP-22340-M$239.95 -
Argentinian Slide Colt Sistema 1927 - (M1911) - BLEMISHED
$349.95Argentinian Slide Colt Sistema 1927 - (M1911) - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED CRACKED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Original...HKP-19778-B$349.95 -
HK416, MR556 Flash Hider - Cloak - Threaded 1/2x28
Strike Industries
$44.95Strike Industries HK416/MR556 Cloak Flash Hider - 1/2x28 Strike Industries Cloak flash hider offers a compact, efficient design that disperses gas flow to minimize visible flash, especially in low light. It reduces muzzle flash to preserve night vision,...HKP-22260$44.95 -
HK MP5K, SP89 Trigger Group with AC Unity Grip and Match Trigger
HKP HK Parts
$644.85HKP HK MP5K/SP89 Trigger Group with AC Unity Grip & Match Trigger The MP5K match trigger group combined with the AC Unity grip is a great choice for anyone seeking a tactical and aesthetically pleasing build. Featuring a robust metal housing and a...HKP-22254$644.85 -
On Sale
HK Mark 23 Barrel - Threaded 16x1 RH - USED
H&K Heckler & Koch
Now: $449.95Was: $599.95H&K Mark 23 .45 ACP Barrel - Threaded 16x1 RH - USED A great replacement item for a now out-of-production pistol. New HK German mark 23 barrel threaded with the factory correct 16x1 RH thread. Get that replacement or factory new spare barrel while...HKP-01038-USEDNow: $449.95Was: $599.95 -
AR15 Buffer Tube - Hex - 7.5" - BLEMISHED
Sig Sauer
$44.95SIG Sauer Phase 5 Hex Buffer Tube for AR-15 Pistols - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. This buffer...HKP-99304$44.95 -
FN P90 Side Rail - Set of 2
FN
$199.95FN P90 Side Rail - Set of 2 ONLY 2 UNITS LEFT - SOLD IN A PACK OF TWO RAILS DOES NOT INCLUDE ALLEN WRENCH Set of 2 side rails for the P90. Compatible With: FN P90 THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS FINAL.HKP-99287$199.95 -
HK93, HK53, AP53 Binary Trigger Group- SEF Contoured
H&K Hechler & Koch / FA Franklin Armory
$1,399.95 - $1,449.95Franklin Armory/H&K 53/93 & AP53 Binary Trigger Group- SEF Contoured US-made binary trigger group installed in a German SEF contoured trigger housing. Features a 3-position selector marked SEF. All three positions align with binary selector...HKP-22169-M$1,399.95 - $1,449.95 -
HK93, HK53, AP53 Binary Trigger Group - 3 Position 2 Round Burst Engraved
H&K Hechler & Koch / FA Franklin Armory
$1,399.95 - $1,449.95Franklin Armory/H&K 53/93 & AP53 Binary Trigger Group- 3 Position 2 Round Burst Engraved US-manufactured binary trigger pack installed in a German SEF-style polymer housing engraved with 0, 1, 2 pictogram markings. All three positions align with...HKP-22168-M$1,399.95 - $1,449.95