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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HK91, G3 Caliber Conversion Kit - .22LR
H&K Heckler & Koch
$1,895.95Heckler and Koch HK G3, HK91 .22LR Caliber Conversion Kit - LIKE NEW SOLD AS IS. NO RETURNS. Convert any HK91 or HK G3 rifle to cycle .22LR ammunition with this genuine HK caliber conversion kit. This kit is intended for marksmanship training and...HKP-22093$1,895.95 -
HK416, MR556 Enhanced Buffer Tube - Tan
H&K Heckler & Koch
$192.95Tan HK 416, MR556 OTB (over the beach) Buffer Tube, Receiver Extension - Commercial Genuine HK German-manufactured 416 & MR556 latest generation, marine environment & and over-the-beach buffer tube. Each commercial buffer tube features built-in...HKP-22086$192.95 -
On Sale
HK MP5 Barrel - 10mm / .40 S&W - Bulged - BLEMISHED
H&K Heckler & Koch
Now: $189.95Was: $579.95Heckler and Koch MP5 40/10 German Bulged Barrel - BLEMISHED MP5 40/10 BULGED barrel. Can be cut down and repurposed for a custom barrel length application. Compatible With: HK MP5 10mm / .40 S&W THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN,...HKP-99174Now: $189.95Was: $579.95 -
On Sale
CQT FX Simunition Conversion Kit for MP5 - 9mm Blue - Spare Part Lot - BLEMISHED
Simunition
Now: $87.95Was: $319.95CQT FX Simunition Conversion Kit for MP5 - 9mm Blue - Spare Part Lot - BLEMISHED SHADES OF BLUE MAY VARY The CQT FX Simunition conversion spare parts lot from original kits. Everything pictured is included. THIS CLOSEOUT PART IS NOT...HKP-99054-BNow: $87.95Was: $319.95 -
On Sale
HK417, MR762 Bolt Head - Complete - E1
H&K Heckler & Koch
Now: $536.95Was: $595.95Heckler and Koch 417 E1 Bolt Head - Complete Rare factory bolt head for the HK417. Compatible With: HK MR762 HK417HKP-22037Now: $536.95Was: $595.95 -
Out Of Stock
HK416 Convex Buttstock - Wrench Included
H&K Heckler & Koch
$97.95H&K HK416 Convex Buttstock w/Wrench Factory-original H&K buttstock with convex buttpad and included tool. Compatible with HK416 rifles using MIL-SPEC buffer tubes (not included). Features: Ergonomic cheek weld Twist-off rubber buttpad with two...HKP-22025$97.95 -
HK21, HK21E, HK23, HK23E Double Frame Front Sight Base
H&K Heckler & Koch
$66.95H&K 21/21E/23/23E Double Frame Front Sight Base Original, unissued German double frame front sight bases. These have never been welded to a cocking tube and are perfect for completing or restoring your build with factory-spec parts. Compatible...HKP-21908$66.95 -
HK21E, HK23E Left Receiver Reinforcement Rail Weldment
H&K Heckler & Koch
$14.95H&K 21E/23E Left Receiver Reinforcement Rail Weldment Genuine German-made weldment for left-side receiver reinforcement rail. Precision-machined using the correct steel and milling for you HK21E or HK23E build. Compatible With: HK21E HK23EHKP-21907$14.95 -
HK91, G3, PTR Bolt Head - Complete - Used
EBO
$99.95EBO HK G3 & HK 91 & PTR Bolt Head Complete - Used Greek HK Contract Date Coded EBO bolt head is manufactured in Greece by Hellenic Arms Industry, utilizing HK tooling and prints. Since the 1980s, it has proven to be one of the best upgrades for...HKP-21903$99.95 -
On Sale
HK MP5, HK91, G3, HK33 Cocking Tube End Cap - Incomplete - BLEMISHED
H&K Heckler & Koch
Now: $21.95Was: $39.95H&K Cocking Tube End Cap/Dust Cap - BLEMISHED SOLD INDIVIDUALLY - VARYING CONDITION SHOWN INCOMPLETE COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. This part...HKP-00099-BNow: $21.95Was: $39.95 -
HK MP5K 40/10 Stock or Brace Adapter
HKP HK Parts
$113.95HKP HK MP5K 40/10 Brace/Stock Adapter Easily attach your favorite A2 style stock to your MP5K 40/10 with this durable, precision-engineered adapter. Made in the US and available exclusively at HK Parts. Compatible with composite and wood A2 stocks...HKP-21869$113.95 -
HK MP5 Receiver Flat - 9mm - no Sling Clip
HKP HK Parts
$189.95HKP HK MP5 9mm Receiver Flat w/o Sling Clip The MP5 9mm receiver flat serves as the foundation for custom MP5 builds. This version does not include a sling clip cutout, offering flexibility for customization. Precision-engineered for compatibility with...HKP-21828$189.95