Introducing the RECCA E(TM) SR-15/M4/AR-15 Carbine Stock by ReptiliaA(R)! After more than two years of development and testing, Reptilia is proud to announce the RECCA E Stock for AR15/M4. Designed at the request of a military end user, the RECCA E Stock features a constant cheek weld, ambidextrous QD sling attachment points, rubber buttpad, and a modular design that allows usage of a standard AR15 carbine buffer system, or A5/SR25 carbine buffer system by replacing the receiver extension (buffer tube) and forward portion of the stock. Weighing only 12.0 ounces including the proprietary AR15 carbine-length receiver extension, the RECCA E stock is the ideal lightweight solution for the entire spectrum of AR-pattern guns from compact to precision. Includes our proprietary carbine length receiver extension "buffer tube" and all mounting hardware. Receiver Extension: 7075-T6 Aluminum, Type III Milspec Anodized Finish Materials: Impact Modified Glass-Filled Nylon Polymer, 7075 Type III anodized aluminum, Nitrided alloy steel hardware Weight: 12.0 oz. Length of Pull: 10.8 in. - 14.2 in. Patents Pending MADE IN USA Features of the Reptilia RECC-E Stock: Can be used with standard AR15 carbine buffer systems or converted to an A5/SR25 carbine buffer system Constant cheek weld Rubber recoil pad Impact-modified glass filled nylon polymer and 7075-T6 Aluminum construction