UMP / USC Series

New HK German USC/UMP 9mm Extractor This is the perfect spare part to have for your UMP or USC 9mm conversion. Hard to find and only available here at HKPARTS.

Magpul RSA - Rail Sling Attachment Attaches to Picatinny rails for an additional point of attachment for slings.

H&K UMP/USC (.40 S&W/.45 ACP/9mm) Bolt Catch Pin

Ambush QD Sling Loop The Strike Industries Ambush low profile sling loop is the lowest profile sling loop designed for the MIL-STD-1913 rail. Made of solid steel, its unique locking bar design system allows for it to be lightweight and durable. Because...

B&T Sling Attachment Loop Swiss-made B&T sling loop for attaching slings to sling eyelets on firearms.  B&T made but compatible with any sling with a clip and firearm with a sling loop or other mounting provision.

G36 & HK UMP Hammer For Lower Or Trigger Group- US Made These hammers are a direct fit on the USC and SL8 platform.

JMAC Universal M-LOK Skeleton Forward Grip  Can be used as a forward grip or a handstop! Features: Reversible and Lightweight M-LOK Compatible (Requires 2 slots) Fits in and across M-LOK Slots Includes mounting hardware 7075 T6 Aluminum Hard Coat...

HK USP, UMP, HK45 Flash Hider - .45 ACP - 5 Prong - Threaded 16x1 LH 5 prong flash hider for .45 ACP firearms featuring a 16x1 LH threaded barrel.  No timing/shims necessary. Compatible With the Following Firearms Threaded 16x1 LH: HK UMP/USC HK45...

HKP HK UMP & USC - Curved Trigger With our new curved trigger, you will improve the aesthetics of your firearm. Our curved trigger has spaced-out serrations at the face of the trigger for a far superior grip. Each trigger counts as one US-made...

H&K 45mm Picatinny Rail Cover - Universal New factory HK rubberized picatinny rail cover. Specifications: Rail cover dimensions: 45x26x7 mm Compatible With: HK picatinny rails Other Picatinny railed applications

HK UMP Catch Release Lever Or Trip Lever For All UMP Lowers  

HK German UMP Or USC .40 Extractor New HK German factory OEM part. This is a high wear and replacement item as the .40 cal cartridge has a high impulse that results in an increased occurrence of this extractor wearing out and breakage. A must-have...