A favorite among disabled veterans, tactical shooters, and casual plinkers across the United States, the SB Tactical® 590 SBM4™ Firearm Stabilizing Brace Kit is the ultimate upgrade kit for Mossberg® 590™ shotguns. Compatible with both 12- and 20-gauge models, this kit includes an ERGO® Flat Top SUREGRIP® pistol grip for improved control, a proprietary castle nut for a reliable lock-up, and an ERGO 590 adapter for quick installation and reliable performance. Plus, this brace is adjustable for a custom fit and features an adjustable nylon strap for added stability and comfort. Order yours today and enjoy improved accuracy and superior comfort and control with your pistol-length firearm — without breaking the bank! Made in USA.