A3 Industries Universal Picatinny Mount - Modular Telescoping Stock w/Magpul 1 Rubber Buttpad Black 8.75in. When fully collapsed the stock only adds 2.00" to the overall length of your firearm. All mounting components are machined from 6061 aluminum and all non-stress areas are profiled to minimize weight without compromising strength. The rods used for telescoping the stock are manufactured from sturdy 3/8" steel and Melonite-coated for ultra wear resistance and rust prevention. With a Picatinny (1913) moounting interface it will attach to any firearm with a rear Picatinny rail. The MTS stock can be mounted in two different vertical positions 1" apart by flipping the mount over. This is helpful when trying to avoid ejection ports or charging handles and can also position the stock higher or lower for different sight pictures. Specifications for A3 Industries Universal Picatinny Mount - Modular Telescoping Stock: Manufacturer: A3 Industries Color: Black Stock/Brace Material: 6061 Aluminum Finish: Melonited Gun Model: SIG Sauer MPX Gun Make: SIG Sauer Condition: New Weight: 9.3 oz Features of A3 Industries Universal Picatinny Mount - Modular Telescoping Stock Only adds 2.00" to overall length when using shortest buttplate (minimalist) Lightest telescoping stock in the market Easy push-button release with 3 or 4 length settings depending on rod length chosen In most applications firearm can be fired when stock is fully collapsed Entire stock can be flipped to provide A 1" Vertical offset Choice of 4 different buttplates Choice of 3 different rod lengths Applications for bufferless AR B&T APC B&T GHM CZ Scorpion CZ Bren 2 HK MP5/SP5 Hk MP5-K/SP5-K Grand Power Stribog And Mac 11/20 Package Contents: A3 Industries Universal Picatinny Mount - Modular Telescoping Stock A3 Industries MTS-8-50-BP3: Universal Picatinny Mount - Modular Telescoping Stock w/Magpul 1 Rubber Buttpad Black 8.75in