HK Rifle / SMG Parts
Elevate Your HK Rifle with Premium Parts – MP5, HK416, SP5, and More!
Enhance your HK rifle with top-notch parts and accessories. From HK MP5 and HK MP5K to HK SP5 and HK UMP or HK USC, we offer a vast selection. Discover high-quality magazines, binary triggers, stocks, grips, barrels, handguards, sights, and more for your firearm. Whether you own an HK416, HK SP5K, HK G36, or HK MP5 22, we have the Heckler and Koch rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.
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On Sale
HK MP5, SP5 Handguard - Slimline Style - GUNSMITH SPECIAL
HKP HK Parts
Now: $15.98Was: $27.95MKE AP5/MP5 Slimline Handguard - GUNSMITH SPECIAL HOLES DO NOT ALIGN - NEEDS MODIFICATION THIS PART IS SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Please Note: Will require work before being functional. HKP...HKP-22222-BNow: $15.98Was: $27.95 -
On Sale
HK91, G3, FMP Locking Piece - USED
H&K Heckler & Koch
Now: $8.93Was: $14.95Heckler and Koch Locking Piece for HK FMP HK91, and G3 - USED SOLD INDIVIDUALLY. USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. HK German Locking Piece for FMP - USED. This is the factory...HKP-16712-USEDNow: $8.93Was: $14.95 -
HK MR556 A4 Hammer - Incomplete - Semi-Auto
H&K Heckler & Koch
$43.95Heckler and Koch Hammer for HK MR556 Semi-Auto rifles Factory-original German steel hammer for MR556 A4 rifles. Designed as a direct replacement for worn or damaged hammers in MR556 A1 and A4 trigger assemblies. Compatible With: MR556A1 MR556...HKP-22384$43.95 -
HK91, G3 Backplate Assembly - Surplus
FMP HK CONTRACT
$14.95FMP HK91, G3 Backplate Assembly - Used/Surplus G3 surplus backplate assembly manufactured by FMP on HK tooling. Compatible With: HK G3, HK91HKP-22374$14.95 -
On Sale
HK MP5 Magazine Locking Plate - 9mm - Black - USED
HKP HK Parts
Now: $3.95Was: $12.95HKP HK MP5 9mm Magazine Locking Plate - Black - USED ONLY 1 UNIT LEFT - AS PICTURED - 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. Locking...HKP-99240Now: $3.95Was: $12.95 -
On Sale
HK UMP (.45 ACP) 25 Round Magazine - German LEO Markings - USED
H&K Heckler & Koch
Now: $89.95Was: $149.95H&K UMP (.45 ACP) 25 Round Magazine - German LEO Markings - Used - BLEMISHED VERYING CONDITION SHOWN - SOLD INDIVIDUALLY USED PARTS ARE SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL USED PART SALES ARE FINAL. Used PD trade-in factory 25 round...HKP-17917-USEDNow: $89.95Was: $149.95 -
Out Of Stock
HK416, MR556 Barrel - 5.56 - 10.4" - Threaded 1/2"x28 - A5
Nefarious Arms
$594.95Nefarious Arms HK MR556416 10.4" A5 Barrel An expertly crafted 10.4" barrel designed for the HK MR556 and 416 platforms. Featuring the A5 profile, this barrel balances durability and weight, making it an excellent choice for both tactical and...HKP-21873$594.95 -
HK MP5K Stock With Direct Fit Adapter - 10mm / .40 S&W
HKP HK Parts
$289.95HKP HK MP5K .40/10mm Stock With Direct Fit Adapter Designed to adapt UMP style and B&T folding stocks directly to the .40/10mm K platform. Made in the USA and available exclusively at HK Parts Compatible With: HK MP5K .40/10mmHKP-21834$289.95 -
Out Of Stock
Picatinny Bipod Mount - Polymer - Rubber Feet
B&T Brugger & Thomet
$145.00B&T Bipod (Polymer) - Picatinny Mount - Rubber Feet Genuine B&T bipod with NAR adapter (Picatinny mount) for use on any firearm featuring a Picatinny bottom rail.HKP-21773$145.00 -
HK MP5, SP5 Barrel - 9mm - 3 Lug - New Old Stock - Rare
H&K Heckler & Koch
$987.95H&K HK MP5/SP5 3 Lug Barrel - New Old Stock - Rare Factory German date coded with H&K logo. This new old stock 3-lug item is incredibly rare and in pristine condition. An absolute gem in the market. We only have a limited number available, and...HKP-21662$987.95 -
B&T 5.56 Rotex-SF Titanium HUB Adapter
B&T Brugger & Thomet
$275.00B&T 5.56 Rotex-SF Titanium HUB Adapter The B&T Rotex-SF HUB is a durable mounting system compatible with all 1.375x24TPI "HUB" suppressors. The HUB easily threads into compatible suppressors and can be secured with a spanner wrench or...HKP-21713$275.00 -
HK G36, SL8 Handguard Eye Bolt - Slings, Bipods
H&K Heckler & Koch
$79.95H&K HK G36/SL8 Sling/Bipod Eye Bolt Factory HK sling and bipod eye bolt for H&K G36 and SL8 rifle models. Steel construction with a durable black finish. Installs easily into the forward portion of the handguard to provide a secure...HKP-21654$79.95