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)
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