The UZI PRO SB features a side-folding Stabilizing Brace, produced for IWI US by SB Tactical LLC, designers and manufacturers of the original SB15 and SB47 Pistol Stabilizing Braces. Originally designed as a means for persons with limited mobility to operate and fire the AR-15 pistol, the custom adaptation of the Stabilizing Brace to the UZI PRO SB takes the application of large frame pistol control and stabilization to a new level. With the IWI brace's unique side folding feature, the UZI PRO SB can be fired with or without the brace extended depending on the shooters need. With the brace in the folded position, storage space required in your safe or range bag is minimized. In all other respects, the UZI PRO UPP9SB is identical to the UPP9S.