From Guns.com:

A pistol equipped with the SB Tactical SBTi folding subgun brace and a 8.5-inch cold hammer-forged chromoly steel barrel, the initial version of the SMG-45 handgun compacts down to 15.3-inches with the brace in the stowed position. Overall length when the brace is extended is 26-inches. Weight is 5.9-pounds.