First Factory Rail Stock Base Umarex 7003 Aluminum Slide & Stainless

7003 Aluminum Slide & Stainless Steel Outer barrel

Design For Open KAC RAS Barrel Nut & R-15 Barrel Nut

Special Design Locking Clamp

reducing rattling from shot to shot

First Factory Rail Stock Base Umarex 7003 Aluminum Slide & StainlessThe First Factory Rail Stock Base is designed to be compatible with the First Factory (Laylax) Picatinny rear stock base series, as well as airsoft models equipped with a Picatinny rail on the stock base. Notable examples include the SIG Sauer Proforce MCX and MPX electric airsoft guns manufactured by VFC (licensed by SIG AIR). This versatile accessory allows for customization by combining it with various airsoft M4 AR 15 compatible retractable