UMAREX H&K USP — 4.5 mm (.177) BB Heavy‑Metal Blowback Replica
An authentic-feeling replica of the legendary Heckler & Koch USP, the Umarex 5.8346 brings realistic handling and presence to the range. Its heavy metal slide and integrated blowback system recreate the look and cycling of a real semiautomatic pistol, while shooting durable 4.5 mm (.177) BBs for reliable, satisfying performance in recreational shooting and collection displays.
Built around a CO₂ powerplant, the USP replica balances realistic weight (976 g) with consistent power from a single 12 g CO₂ cartridge. Ergonomics and controls mirror the original: single/double-action trigger, 22‑round detachable magazine, and a decocker safety provide authentic operation and safe handling for experienced airgun users and collectors alike.
Key Features
| Feature |
Benefit |
| Heavy metal slide with blowback |
Realistic recoil impulse and authentic cycling for immersive range use |
| 4.5 mm (.177) BB caliber |
Common, affordable BBs with predictable trajectory and durability |
| 1x 12 g CO₂ power |
Easy-to-replace power source for consistent shots per cartridge |
| 22‑round magazine |
High capacity for extended shooting before reloading |
| Single / Double Action trigger |
True-to-life operation and trigger feel for collectors and shooters |
| Decocker safety |
Safe carry and handling that mirrors the original firearm’s controls |
| Robust weight & size (976 g, 192 mm) |
Authentic heft and balance for realistic training and display |
Specifications
| Specification |
Value |
| Energy level (E₀) |
< 3.0 J |
| Velocity (V₀) |
100 m/s (328 fps) |
| Caliber |
4.5 mm (.177) BB |
| Power source |
1 × 12 g CO₂ |
| Magazine capacity |
22 rounds |
| Shot capacity (per CO₂) |
~100 rounds |
| Trigger |
Single / Double Action |
| Safety |
Decocker |
| Length |
192 mm |
| Weight |
976 g |
| Holster type |
A |
