Made by Metal , extreme durable.
Clever Top/Bottom Two-Piece Design with Integral Spinal Cords/Alignment Housing for Great Fit .
Designed with Innovative Alignment Tabs at the Front for Perfect Fit with the Standard Triangular Front Cap .
Fits Mid. Length Model 4/15 .
Includes Four Picatinny Rails Each with 18 Slots .
Great Zero-Retention Capability for All Accessories Installed on the Rails .
Easy Installation with No Modification to the Barrel .
Length : 225 mm
Weight (Gram):498 (With Box)