The SB Tactical® 410 SBM4™ Firearm Stabilizing Brace Kit is the ultimate upgrade kit for .410 bore shotguns. Constructed of an impact-resistant polymer, this lightweight kit includes an ERGO® Flat Top SUREGRIP® pistol grip for improved control, a steel castle nut for a reliable lock-up, and an ERGO adapter for quick installation and reliable performance. Plus, this brace features an adjustable nylon strap for added stability and comfort. Made in USA.