The B&T Universal Service Weapon (USW) is a stocked pistol designed for enhanced accuracy and tactical applications, particularly for law enforcement. It features a compact, holsterable design with an integrated folding stock for improved stability during longer shots. The USW platform also offers compatibility with extended 30-round magazines and has evolved into chassis systems like the USW-320 for platforms such as the Sig P320.
The B&T USW-320 chassis transforms the SIG P320 into a stocked pistol, offering improved stability for precision tasks. While not a carbine replacement, it excels in roles requiring a compact, accurate firearm for security or law enforcement. Testing at Desert Brutality revealed challenges with long-range accuracy due to mechanical limitations and optic parallax, as well as a trigger reset failure caused by desert grit.
This video details the assembly of a custom SIG USW-320, a modular pistol build. It highlights the SIG P320's modularity, where the Fire Control Unit (FCU) is the serialized part. The build incorporates a B&T USW chassis, an Agency Arms slide with a compensator, and a Trijicon RMR optic. Crucially, it notes that adding a folding stock to the USW-320 requires NFA registration as a Short Barreled Rifle (SBR).
This review explores the B&T USW (Universal Service Weapon) concept, starting with the original USW-A1 based on the Sphinx pistol and its history dating back to WWI PDW concepts. It highlights the evolution to modern chassis systems, including the USW-320 for the Sig P320 and a new aluminum chassis for Glock 17 (Gen 3-5). The chassis systems offer a stocked, holsterable PDW solution, enhancing accuracy while maintaining compact size.
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