USA

Ram-It Loader  Magazine Loader for 556 and 223 magazines. Made in the USA from ABS. Very simple to use.

HK MR556 & MR762 Eyelet Sling Adapter for Carrying Sling  New eyelet sling adapter for carrying slings. Perfect option for those that want to match their RAL8000 or tanodized handguards...

Perfect size handguard for our MP5KSD shrouds. Our handguards will engage perfectly on the machined lugs of our MP5KSD shrouds. The best looking handguard for those doing a MP5KSD conversion. Only...

Threaded barrel extension, Fake suppressor – USA Total weight is 14 oz made from steel & aluminum, overall diameter is 1.4 inches.   Perfect for that rifle build or for those looking...

HK UMP, USC - Left Side Hammer Spring For All Lowers New U.S hammer spring- Left Side A high wear item that needs to be changed when light firing pin strikes develop on your USC or UMP firearm. Fits...

2 position pictograph housing.

Ejector Lever Axel Retaining Spring Ring This is the perfect spring ring to replace your worn out ejector lever axel spring ring. Made out to HK spec for the best US replacement part on the market...

HK MP5-SD 9mm Barrel Made in the USA of 416 Stainless Steel. This high quality barrel is processed using the highly desirable Nitride process which creates a super hard durable finish. Precision...

G36 & UMP Pistol Grip Insert For All G36 & UMP Lower Housings. This is the piece that locks into place and fits in the bottom of the handle itself. This is a perfect storage location for...

Used Magwell - Gray - SL8

Used Magwell - Black - SL8

Replacement Screw For Trijicon RMR6-32 x 1/2" flat head socket cap screw with thread locker. Requires a 2mm allen head key.This replacement screw is to mount your Trijicon RMR optic to your #2...

Contract Housing  - S,U,O - Used Hand PickedHK93,HK53 SUO polymer lower housing. Malaysian contract housing for SEF type trigger packs. Used - hand picked units already clipped and pin and ready to...

HK Sl8, G36 Sight Rail With Front & Rear Fixed Sights  US made HK HK Sl8, G36 picatinny rail with fixed iron sights.  Comes exactly as shown with no mounting hardware. Fits all: HK...

HK UMP, USC Right Side Hammer Spring For Lowers - USA

Aimpoint T1 & H1 Low Profile Mount For HK MP5, MP5KNew US manufactured scope mount that is similar in style as the revered B&T optics mount only made right here in the USA. All Aluminum and...

Barrel - USA - HK G36E Brand new HK G36E barrel. Barrel length 19".

Newly designed and contracted DMR heavy buffer to be added to existing HK G3,91 PTR rifles that have been outfitted to a role as DMR (Designated Marksman Rifle) for a specialized unit. The Improved...

US Made MP5K-N PDW 10mm Barrel that is threaded and 3 lugged with the 9/16x 24 thread pitch. Rare & hard to find only a few are available.

Front Sight - HK USC, UMP - USAFits all models of USC and UMP's. Easy to swap out with just knock out the roll pin replace and then re-insert the roll pin. Common wear or breakage part.

HK G36 & SL8 Bolt CatchOn AR-15 systems this would be similar to a cam pin.Fits all: G36, G36K, G36C Sl8 variants

HK SL8/G36 Full Size Aftermarket Bottom & Side Rail Set Complete Comes with the bottom and 2 side rails (left and right) as well as the screws and allen wrench. Made of aircraft-grade aluminum...

HK G36 & SL8 Magazine Paddle ReleaseHK G36 Mag Release or mag catch. Fits All variants & models of the SL8 & G36. HK SL8 HK G36 HK G36K HK G36C

HK G36, HK SL8, HK 416, HK MR556 Gas Piston - Black Complete assembly with 3X rings installed and nitrided black in color. Counts as one US made compliant part for your SL8 - G36 style conversion...

Each barrel is finely and painstakingly made from ordnance grade steel, heat treated and finished inside and out in the ultra-desirable "nitride" finish. Each enhanced barrel is machined with an...

Sl8 & G36 Extended Bolt Hold Open LeverNew Sl8, G36, HK243 bolt hold open lever. A must have upgrade for your HK SL8, Sl8-G36 conversion or G36 firearm. The bolt hold open lever is a drop in...

MP5 to MP5K Housing Conversion Service At HKPARTS we are now offering our own HK trigger housing Conversion service. No one does a better job with quicker turn around then we do. This conversion is...

HK Clipped & Pinned Service - Universal SP5/MP5At HKPARTS we offer our own HK trigger housing clip & pin services. No one does a better job with quicker turn around then we do.We will clip...

HK Small push pin - US MAde All Steel US Made small push pin for use on the lower grip housing for a push pin style of lower housing. Black Nitride finish which adds extra durability to the pin plus...

HK UMP 45 magazine & LWRC SMG45 - FDEMade from advanced polymer material with steel feed lips just like the German UMP 45 magazine at a fraction of the cost. This UMP 45 mag will fit all HK UMP ...

Trijicon RMR/SRO 45° Rail Offset AdapterPerfect for that situation where you need the versatility of a magnified optic paired with a Trijicon RMR or SRO red dot sight in close quarters.This offset...

New US UMP Style Folding Stock assembled With Our Own HK Parts Stock Adapter.  Our HK Parts stock adapter was made from a solid billet of CNC machined aircraft grade aluminum with QD Sling...

HK UMP .45 Magazine Follower - USANew UMP .45 magazine follower for all HK UMP .45 magazines. Fits all UMP 45 magazines both US or German

A2 Style Flash Hider - 3 Lug - 9mm - USA Easily attaches to the end of any factory specification 9mm 3 lugged barrel. This flash hider does not require the of threads as it attached to the 3 lug tip...

HK MP5K Side Reinforcement Tabs.

New Complete MP5 .22lr Folding Stock with GSG9 UMP Style Stock Section. Each stock uses a UMP Style Stock for a longer length of pull and a includes a new CNC Machined Stock adapter specifically...

HK 33 Surplus Wide Forend.Surplus condition, with minor scratches and wear on the polymer exterior in very good shape overall. 11.5 inches long.The aluminum heat shielding is still intact, riveted...

HK 416 / HK417 Buffer Retainer Spring. This item is the spring for the buffer retainer that is held in the rear of the lower receiver. HK 416 HK 417