Heckler & Koch USC .45 ACP Semi-Automatic Rifle – 16" Cold Hammer-Forged Barrel, Black Polymer, 2018-2020 Production
The HK USC is the civilian, closed-bolt counterpart to the renowned UMP submachine gun. Built in Germany and offered only in limited, sporadic runs, this 2018-2020 black-polymer example combines HK’s proven blowback system with a lightweight, glass-fiber-reinforced frame. A 16" cold hammer-forged barrel, robust diopter sights, and ambidextrous controls make it a standout choice for collectors and shooters seeking a factory-original platform for UMP-style conversions.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling – Sharp lands and grooves.
This rifle shows a few minor, superficial scratches and blemishes from light handling, but no notable mechanical wear.
What’s Included
- Original HK hard case
- 6 × 25-round HK polymer magazines
- 2 × 10-round HK polymer magazines
- HK USC accessory Picatinny rail kit (two polymer rails, new in bags)
- Spare HK USC complete lower/trigger housing (double-stack magazine well)
- Spare HK USC skeleton thumb-hole stock
The Heckler & Koch USC uses a simple blowback, closed-bolt action that delivers reliable function with stout .45 ACP loads. Its non-reciprocating left-side charging handle includes a built-in hold-open notch for quick lock-back and manual of arms familiar to HK users.
A 16" cold hammer-forged, un-threaded barrel with a right-hand 1:16" twist optimizes accuracy while maintaining compliance with import restrictions. The skeletonized thumb-hole stock and single-stack lower were designed to meet U.S. 922(r) and former AWB criteria, giving the rifle its distinctive profile.
German CIP proof marks, matching serial numbers on the receiver and barrel, and an importer stamp from Heckler & Koch Inc., Columbus GA, authenticate its origin and production period. The matte-black polymer frame and receiver reduce weight without sacrificing durability, while integral mounting points accept the included Picatinny rail kit for optics or accessories.
Two 10-round single-stack magazines fit the rifle as currently configured. Six 25-round double-stack magazines and a spare double-stack lower are provided for future conversion; however, not all parts required for a full UMP-style conversion are included, and professional gunsmithing will be needed to enable use of the high-capacity magazines.