Rifle / SMG Parts
Elevate Your H&K Rifle with Premium Parts – MP5, HK416, SP5, and More!
Enhance your H&K rifle with top-notch parts and accessories. From MP5 and MP5K to SP5 and UMP/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, SP5K, G36, or MP5 22, we have the H&K rifle parts you've been looking for. Shop now to upgrade your rifle to perfection.
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Out Of Stock
HKP SP5K Bench Mat
HKP HK Parts
$13.95HK MP5K, SP5K, SP89 Gunsmithing Bench Mat This isn't your ordinary gun cleaning mat. Show your pride for your HK SP5K firearm while using our high quality neoprene rubber backed and cloth topped gun cleaning mat to protect your gun bench, desk, kitchen...hkp-18213$13.95 -
Out Of Stock
HKP, Walther 416 .22LR PDWC Retractable Stock - Black
HKP HK Parts
$0.00HK 416C Style PDW Stock - HK, Walther .22 LR The long anticipated PDW style AR15/M4 Stock is now available for the HK 416 .22 models. Made in the USA. The best PDW stock design available in the smallest package. Ergonomic, easy to use and designed...HKP-17840$0.00 -
Out Of Stock
HKP/H&K 91/G3 (7.62x51/.308) Trigger Group - 3 Position - Navy Housing
HKP HK Parts
$579.95G3, 91, PTR Trigger Group 3 Position Navy Housing Introducing a cost-effective alternative to the high-priced and rare all-German HK FBI or 0,1 ambidextrous trigger groups. This semi-auto trigger group is available in a 3-position Navy factory German HK...HKP-17242$579.95 -
Out Of Stock
HKP/H&K UMP 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug
HKP HK Parts
$999.95HKP/H&K UMP 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP conversion. The total...HKP-02285$999.95 -
JMAC Universal Picatinny 8" Triangle Stock with 1913 Folding Mech
JMAC Customs
$261.00JMAC Triangle Stock 8" Stock with 1913 Folding Mech Features: 2x Integrated QD Sling Socket 8" Length 0.275" Cheek Rise Drilled and tapped for optional cheek risers 7075 T6 Aluminum Hard-Coat Anodized **Not compatible w/LevTech Manufacturing panels...HKP-21245$261.00 -
KDG HK MR556 10" M-LOK Rail System - Black
KDG Kinetic Development Group
$374.95Rail System - 10" - Black - M-LOK - HK MR556 The New KDG HK 556 M-LOK rails are direct mount rail system, replacing the factory HK 556 rail systems. These new rails are identical in design to their big brother, the KDG HK 762 M-LOK Rail system. Like the...HKP-19246$374.95 -
KDG HK MR556 13.75" M-LOK Rail System - Black
KDG Kinetic Development Group
$399.95Rail System - 13.75? - Black - M-LOK - HK MR556 The New KDG HK 556 M-LOK rails are direct mount rail system, replacing the factory HK 556 rail systems. These new rails are identical in design to their big brother, the KDG HK 762 M-LOK Rail system. Like...HKP-19244$399.95 -
Magpul HK MP5 Adapter Brace with Stock
Magpul
$189.95Magpul HK MP5 Adapter Brace with Stock MP5 DT Magpul stock ready to install on any in-spec MP5 receiver or clone. We take our AR MP5 Adapter and attach it onto a mil-spec buffer tube before combining it with the new Magpul DT Carbine stock. This is a...HKP-21402-M$189.95 -
Magpul HK MP5K AR Match Trigger Housing
Magpul
$349.95Magpul HK MP5K AR Match Trigger Housing This match-grade trigger housing is expertly crafted to elevate the performance of your HK MP5K. Our enhanced HK-AR Navy ambidextrous lower housing and Magpul MOE grip not only provide a modern aesthetic but also...HKP-21379$349.95 -
Magpul Moe K2 XL AR Grip
Magpul
$22.95Magpul Moe K2 XL AR Grip Designed for shooters with larger hands, the K2-XL Grip is similar to the MOE-K2 Grip – AR15/M4 but nearly 25% bigger. A drop-in upgrade for the AR15/M4, it offers a more vertical grip angle thereby improving comfort...HKP-21554$22.95 -
Out Of Stock
MFI MP5K 9mm Barrel Extension/Faux Suppressor - 3-lug
MFI
$179.95MFI MP5K 9mm Barrel Extension/Faux Suppressor - 3-lug Each faux suppressor is designed to attach to the 3 lug MP5K 3 lugged barrel and can be permanently attached (blind pinned) in place to get the overall length of 16.25"overall. Perfect for that rifle...HKP-18007$179.95 -
MI/HKP HK MP5 .22 LR Alpha Folding Stock
MI Midwest Industries
$419.95Midwest Industries/HKP HK MP5 .22 LR Alpha Folding Stock Brace Adapter The Midwest Industries alpha folding stock paired with the HK Parts picatinny rail adapter offers unparalleled versatility. Adjust your length of pull, cheek riser, and butt pad to...HKP-21515-M$419.95 -
Out Of Stock
Michaels Machines HK USC/UMP 9mm Semi Auto Bolt Carrier - Incomplete
Michaels Machines
$499.95HK UMP 9mm - Semi-Auto Bolt Stripped The semi-auto bolt is required for HK USC to HK UMP caliber conversions. The full-auto bolt carrier will not work in HK USC rifles. Features: Tungsten filled Heat treated Parkerized & polished Marked 9X19mm just...HKP-19871$499.95 -
Out Of Stock
MKE HK 93/33 (5.56/.223) Forearm - Green
MKE
$99.95HK 93, 33, 33K & Z43 Green Forearm New MKE production HK 33/93 & Z43 length forearm in green.HKP-17967$99.95 -
MKE HK MP5 Retractable Buttstock - Cerakoted
MKE
$379.95MKE HK MP5 / AP5 Retractable Buttstock Transform your MP5-AP5 Clone with the essential upgrade that defines its iconic look. The A3 collapsible design delivers a customizable length of pull for unparalleled comfort and control. With a straight forward...HKP-21610-M$379.95 -
Out Of Stock
$44.95 -
Out Of Stock
MM HK 21 (7.62x51/.308) Trunnion
H&K Heckler & Koch
$0.00US Made HK21 Trunnion By Michael's Machine (MM) These are the finest US-made trunnions available.HKP-00246$0.00 -
MM HK 21E/23E/MSG90 (7.62x51/.308) & (5.56/.223) Railed Scope Mount
Michaels Machines
$687.95HK21E/23E Or MSG90 Quick Release Full Picatinny Rail Scope Mount Rock-solid scope made in the USA to factory HK specs. Available exclusively at HK Parts. Please Note: These units are shipped in bulk and will have handling marks on the rails. Units are...HKP-01923$687.95 -
MM HK 23E (5.56/.223) Belt Box
Michaels Machines
$599.95HK23E & MM23E Belt Box Brand new HK23E, MM23E US made feed box. The German units have long since been out of production. These are exact copies of the German units. Made in the USA. Compatible With: MM23E HK23EHKP-17579$599.95 -
Out Of Stock
MM HK 23E (5.56/.223) Complete Feed Mechanism
Michaels Machines
$3,999.95MM HK 23E (5.56/.223) Complete Feed Mechanism New US manufactured HK23E feed mechanism complete with top plate and push pin. The complete unit a great spare to have on hand. Compatible With: Factory HK23E and MM23E firearmsHKP-17578$3,999.95 -
Out Of Stock
MM HK 23E (5.56/.223) Light Rifle Barrel
Michaels Machines
$0.00HK 23E (5.56/.223) Light Rifle Barrel Brand new US-made custom rifle barrel. 17.75-inch barrel includes the flash hider and the factory-correct barrel handle 1 x 9 twist. This has a lighter profile to save on weight...HKP-02514$0.00 -
MP5K PDW German Parts Kit - 4 Position Trigger Group
$8,999.95MP5K PDW German Parts Kit: Rare and ultra desirable MP5K PDW parts kit. In good to like new condition with a factory marked HK folding stock and the ultra desirable 4 position 0, 1 , 3 , F burst trigger group , 3-lug threaded barrel (1/2 x 32...HKP-20759$8,999.95 -
MR762 German E2 Concave Butt Pad With Bowden Retaining Wire - HKP
H&K Heckler & Koch
$69.95MR762, 417 German E2 Concave Butt Pad With Bowden Retaining Wire Harness This item can be added as an option on the HK MR762 & HK712/G28 E1/E2 stock. Provides an option to use either the concave or convex style buttpads for different mission...HKP-17687$69.95 -
Omega HK UMP Rear Sight Complete
OMEGA
$39.95Omega HK UMP Rear Sight Complete: All the parts needed for the rear sight on a Gideon Shadow UMP style build. New USA made parts for your build. Will only work with Gideon Shadow. Will not work with a German UMP receiver, DEF Gunz or TMP.HKP-21266$39.95 -
PTR PDW (7.62x39) & (7.62x51/.308) Semi-Auto Bolt Carrier
PTR
$260.95US-Made PTR PDW Semi Auto Carrier Made by PTR using the same blueprints and materials the German HK factory uses, has allowed PTR91 to manufacture the finest of HK-style firearms here in the US. The PDW semi-carrier is another example of superior...HKP-14140$260.95 -
PTR PDW (7.62x51/.308) 9 inch Barrel
PTR
$189.99PTR PDW .308 Pistol or SBR Barrel- USA This part comes new in the white, never installed, and ready for the HK project. Features: Just under 9" inches long 1:10 twist U.S. made barrel counts as one 922r compliant part Please Note: PTR barrels have...HKP-02788$189.99 -
On Sale
Raddlock HK 91/G3 (7.62x51/.308) Magazine Block - 10 Round - BLEMISHED
Raddlock
Now: $5.95Was: $9.95Raddlock HK 91/G3 (7.62x51/.308) Magazine Block - 10 Round - BLEMISHED POOR FINISH. COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. This plug is...HKP-02443-BNow: $5.95Was: $9.95 -
RCM HK 23E (5.56/.223) Locking Piece #20 - 70 Degree
RCM
$49.95New US-Made #20 Locking Piece - 70 Degree For HK23E New US-manufactured RCM # 20 70-degree locking piece for HK23E and other custom builds. Made from the finest ordnance grade steel and heat treated to perfection. A perfect spare for your...HKP-02525$49.95 -
RCM HK G3 & M61 (7.62x51/.308) Barrel - Threaded 15x1 RH
RCM
$274.95RCM HK G3 & M61 (7.62x51/.308) Barrel - Threaded 15x1 RH Brand New Barrel for the Pre-G3 HK M61. The M61 was produced by H&K in Germany and has some aesthetic features that the final G3 rifles did not incorporate. A true piece of history can be...HKP-21353$274.95 -
RCM HK MP5 & MP5K 40/10 SD 115 Degree Locking Piece
RCM
$44.95RCM HK MP5 & MP5K 40/10 SD 115 Degree Locking Piece Compatible With: MP5/K 10 MP5/K 40HKP-21525$44.95 -
RCM HK MP5 & MP5K 40/10 SD 120 Degree Locking Piece
RCM
$44.95RCM HK MP5 & MP5K 40/10 SD 120 Degree Locking Piece Compatible With: MP5/K 10 MP5/K 40HKP-21524$44.95 -
RCM HK MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug
RCM
$279.95RCM HK MP5 .40 S&W Barrel - Threaded 14x.75 - 3-Lug This is the ultimate US-made barrel for any new or conversion build for the MP5 .40 cal. Crafted from top-grade CHF 41v40 material, it’s machined to impeccable standards. With the correct...HKP-21582$279.95 -
RCM HK MP5K .40 S&W Barrel - Threaded 14x.75 - 3-Lug
RCM
$279.95RCM HK MP5K .40 S&W Barrel - Threaded 14x.75 - 3-Lug This is the ultimate US-made barrel for any new or conversion build for the MP5K .40 cal. Crafted from top-grade CHF 41v40 material, it’s machined to impeccable standards. With the correct...HKP-21585$279.95 -
RCM HK33K .300 BLK K Length Barrel - Threaded 5/8x24
RCM
$234.95RCM HK33K .300 BLK K Length Barrel - Threaded 5/8x24 Each barrel is designed for use with popular AAC-Style quick detach muzzle brakes and suppressors featuring a 5/8x24 thread pitch. It is also suitable for most .300 BLK suppressors and applications...HKP-16952$234.95 -
Out Of Stock
RCM MP5 & HK34 9mm Barrel - Threaded 1/2x28
RCM
$249.95RCM MP5 & HK34 9mm Barrel - Threaded 1/2x28 Each barrel is meticulously crafted from premium cold hammer forged (CHF) 41V45 steel, expertly profiled and chambered with a 16-flute chamber profile. Finished with a highly durable nitrided coating for...HKP-17761$249.95 -
RCM MP5 40/10 Complete Bolt Head
RCM
$211.95HK MP5 40/10 Bolt Head Complete - RCM- US Each bolt head incorporates the same enhanced material as all of the new RCM products. Ideal to replace out of spec, worn or broken bolt heads or for that custom build. Each bolt head will work and fit on...HKP-02664$211.95 -
RCM MP5 40/10 Full Auto Bolt Carrier
RCM
$157.95MP5 40, 10mm - Full Auto Bolt Carrier Machined completely from billet ordnance steel. This carrier is made to the latest specs and are Tungsten filled and heat treated providing the finest American made carrier available. Compatible With: MP5 40 MP5...HKP-01192$157.95 -
RCM MP5K 40/10 Full Auto Bolt Carrier
RCM
$157.95MP5K 40/10 Full Auto Bolt Carrier - Latest Upgraded Version This part is built from billet ordnance steel. This US-made MP5K 40,10 style carrier is made with Tungsten and is heat-treated, providing the finest American-made carrier...HKP-01826$157.95 -
On Sale
SB Tactical HK MP5K Pistol Stabilizing Brace SBA4 - OD Green
SB Tactical
Now: $249.95Was: $349.95SB Tactical HK MP5K Pistol Stabilizing Brace SBA4 - OD Green MP5K, SBA4 5-position adjustable brace features an integral ambidextrous QD sling socket for a quick install and removal sling attachment. This brace is the perfect addition for your...HKP-20354Now: $249.95Was: $349.95 -
Out Of Stock
SchuBrichtung HK G3 & MP5 Illuminating Light and Aiming Projector
SchuBrichtung
$399.95Illuminating Light and Aiming Projector - HK G3 & MP5 Rare aiming projector used by German police and military. Will fit and work on the factory HK spec 90's series firearms. Each unit comes with the factory HK claw mount most units are in exc to...HKP-19492$399.95