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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HK34 9mm Rifle Build Kit - Navy Binary
HKP HK Parts
$2,279.95HK34 9mm Rifle Build Kit - Navy Binary Just when you thought all permutations of roller-lock kits had been exhausted, HK Parts brings you the HK34 rifle kit. The HK34 strikes a balance between the shoot-ability of a pistol caliber with the versatility of...HKP-22075$2,279.95 -
On Sale
HK MP5 Trunnion - .40 S&W, 10mm - Factory - USED
H&K Heckler & Koch
Now: $297.95Was: $549.95H&K MP5 40/10 Factory Trunnion - USED ONLY 1 UNIT AVAILABLE - AS PICTURED Used genuine German trunnion with round guides. Compatible With: HK MP5 40/10 THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS FINAL.HKP-99173Now: $297.95Was: $549.95 -
HK MR762 A4 Hammer
H&K Heckler & Koch
$40.95Heckler and Koch Hammer for HK MR762 A4 Rifles Factory-original German steel hammer for the MR762 A4. Designed as a direct replacement for worn or damaged hammers in MR762 A4 trigger assemblies. Compatible With: HK MR762 A4HKP-21968$40.95 -
HK91, G3, PTR Magazine Spring - 5 Round
H&K Heckler & Koch
$22.95H&K 91/G3/MSG90 5 Round Magazine Spring This factory HK spring is designed for the 5-round HK91, G3, and MSG90 magazines. Built for durability and reliable feeding, it's an essential replacement part to keep your magazine in top condition. Compatible...HKP-21827$22.95 -
HK MP5K Stock or Brace Adapter - .40 S&W, 10mm
HKP HK Parts
$129.95HKP HK Parts Brace and Stock Adapter for HK MP5K .40, 10mm Add your favorite brace or stock to your 40 or 10mm MP5K with the HK Parts stock adapter. Designed to adapt UMP style and B&T folding stocks directly to the 40, 10 K platform...HKP-21832$129.95 -
HK21 Sling Mount for Barrel Shroud
H&K Heckler & Koch
$38.95Heckler and Koch Barrel Shroud Sling Mount for your HK21 Features: German-made spring steel sling clip Designed for the HK21 and HK21-A1 barrel shroud Correct HK production part for a secure sling attachment Compatible With: HK21, HK21-A1 HK21E,...HKP-21820$38.95 -
HK UMP, USC 4 Piece M-LOK Set - Cerakote
HKP HK Parts
$139.95HKP HK UMP/USC 4 Piece M-LOK Set - Cerakote Upgrade your UMP/USC with the HK Parts 4-piece M-LOK set. This kit significantly expands the range of attachments you can add to your UMP/USC receiver, making it the ultimate choice for customization. Crafted...HKP-21664-M$139.95 -
On Sale
HK G3 Brass Catcher
B&T Brugger & Thomet
Now: $297.95Was: $385.00B&T HK G3 Brass Catcher THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN, REFUND, OR EXCHANGE. SALE IS FINAL. Mounts to B&T tri-rail handguard (BT-21042) which is no longer available from B&T. The B&T HK G3 brass catcher is a...HKP-21703Now: $297.95Was: $385.00 -
HK MP5K Barrel - .40 S&W - Threaded 14x.75 with 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 -
HK MP7, G36 Picatinny Side Rail
B&T Brugger & Thomet
$57.95B&T HK G36/MP7 Picatinny Side Rail Comes with all mounting hardware. Each rail is sold individually. Compatible With: HK G36 HK MP7 Specs: 127mm lengthHKP-21419$57.95 -
HK416 Handguard - 9" - Strike Industries GRIDLOK - Full Duty
Strike Industries
$318.95Strike Industries HK 416 - 9" Handguard - Gridlok Full Duty The Strike Industries GRIDLOK® Rail for 416 gives you a primary, a secondary or multiple setup options as a quick and direct handguard swap. The GRIDLOK® Rail for 416 has the SI patent...HKP-21312$318.95 -
Out Of Stock
HK MP5 Navy Binary Trigger Group - Engraved - RAL8000
HKP HK Parts / FA Franklin Armory
$1,499.95Franklin Armory BFSIII HK-C1 – Trigger Group - RAL 8K Coming Soon! 3 Position Navy style Engraved Pictograph – HK Binary Trigger Group Our latest and greatest Binary trigger group freshly delivered with a factory HK German housing that...HKP-21290-M$1,499.95