B&T USW Polymer Lower Coyote Tan BT-430191-K

Upgrade your Sig Sauer M17/M18 pistol with the B&T USW conversion kit! This kit gives the operator the option of deploying a foldable shoulder stock, effectively giving the pistol carbine-like performance in a compact package.

Note: Pistols with the USW kit installed will be classified as a Short Barreled Rifle (SBR). All NFA, state, local, and federal laws apply.