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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HK416, COLT M4 Magazine Spring - .22LR - 10 Round
HKP HK Parts
$2.95HKP 10 Round HK 416/COLT M4 .22 Magazine Spring A good supply of spare mag springs is a must. These are ideal to have on hand as the spring can become damaged or worn out. New production mag spring for your Walther/Umarex 416 & Colt 10 round 22 LR...HKP-14542$2.95 -
Out Of Stock
HK416, MR556 9" Quad Rail
H&K Heckler & Koch
$419.95H&K HK 416/MR556 9" Quad Rail HK German 416, MR556 Quad Rail without mounting screw. Specifications: Length: 9 1/4" Color: charcoal gray Compatible With: HK MR556 HK 416HKP-16858$419.95 -
HK G36E Bayonet Lug - Factory
H&K Heckler & Koch
$89.95HK German Factory G36E Bayonet Lug Rare and hard to find. The inside diameter (ID) is 16mm in size. A great alternative for those that do SL8 conversions as well as M27 look clone barrel conversions. You will need the G36 bayonet lug roll pin as it...HKP-00354$89.95 -
HK UMP, USC Stock Block B Thumb Screw
HDPS
$74.95HDPS HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B Sling Pin-Thumb Screw Style The original thumb screw version for all stock block B's.HKP-15731$74.95 -
HK33, HK53, HK93 Firing Pin
H&K Heckler & Koch
$79.95H&K 93, 53, & 33 (5.56/.223) Firing Pin This is the factory-correct HK German firing pin and is a great replacement part. This is also a great upgrade for your HK 223.556 clones. This part is no longer available from HK as this part is out of...HKP-00192$79.95 -
Out Of Stock
HK MP5 Barrel Chamber Flute Cleaning Brush - .40 S&W / 10mm
H&K Heckler & Koch
$29.95New HK German MP5 40, MP5 10mm Chamber Flute Brush This is a must-have brush to keep the flute clean and the firearm running the way it should. Get this item while you can, it is no longer in production and is hard to find. Compatible With: MP5 40 MP5...HKP-00139$29.95 -
HK MP5SD Parts Kit - Pistol Build - 9mm - Receiver Flat and Weldment Set
HKP HK Parts
$2,249.95HKP HK MP5SD Kit - Pistol Build - 9mm MP5SD 9mm parts kit complete with all the parts needed for an MP5 semi-auto pistol. Each kit comes with all 6 of the needed US made compliance parts. This is the first time that these iconic kits have been...HKP-18052$2,249.95 -
Out Of Stock
HK416, MR556, HK417, MR762 Tactical Grip
Ergo
$54.95Ergo Grip PSG1 Style Grip For MR556 & MR762 Just in and a great upgrade if you want the PSG1 style grip frame for your HK MR556, MR762 & HK416, HK417, G28 firearm. The ergonomically enhanced ERGO Tactical Deluxe Grips fits all AR15, M16 and MR...HKP-17131$54.95 -
HK416, MR556 AR-15 Drum Magazine - PMAG D60 - 60 Round
Magpul
$135.95Magpul PMAG D-60 60 Round AR-15 5.56/.223 Drum Magazine The PMAG D60 is a durable, lightweight, highly reliable 60-round 5.56x45 NATO/.223 Remington polymer drum magazine for AR15/M4 compatible weapons. The unique drum configuration keeps the height of...HKP-18006$135.95 -
HK MP5K, SP5K Folding Stock - 10"
Zenith
$99.95Zenith HK MP5K, SP5K, SP89 Folding Stock Folds to the side for compact storage while providing a solid, stable shoulder stock when deployed. No modifications required on in-spec MP5K receivers. Specifications: Polymer and fiberglass reinforced Weight:...HKP-22419$99.95 -
Out Of Stock
HK MP5 Barrel Retaining Pin - 5.015mm
H&K Heckler & Koch
$14.95H&K 90 Series Barrel Retaining Pin - 5.015mm Each barrel pin is used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel. Compatible With: HK MP5, SP5, MP5K,...HKP-22284$14.95 -
MR556 A4 Upper Receiver Kit - 16.5″ - 5.56 - M-LOK
H&K Heckler & Koch
$1,939.00H&K MR556 A4 16.5″ 5.56 M-LOK Upper Receiver Kit This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HK’s piston and pusher rod system. This system utilizes a piston...HKP-21909$1,939.00