This is a Midwest Industries Rail known as the SSR SCAR Rail Extension, model MI-S1617-SSR.
Midwest Industries is a proven leader in the firearm industry. Made in America" focusing on the small details to make your rifle platform better. The addition of their SCAR series handguard to your rifle platform creates the rail space you need to add your accessories and change the feel of your rifle with a new streamline design. This SSR SCAR 16 & 17 Series rail extension gives the rifle a full length monolithic top rail. Features two anti-rotation QD sockets for push button swivels and has four MIL-STD 1913 rails.
Features:
Extremely rigid and rugged lightweight design
Allows the rifle to be fully serviced including removal of the gas piston.
