A collapsible drop-in upgrade for most GBB airsoft AR-15 or M4 rifle, including WE Tech GBBRs, the Magpul MOE SL (Slim Line) Stock is a slim, streamlined upgrade packed with features. There are three standard options for mounting a sling, including an ambidextrous QD sling mount (swivel and sling sold separately). Dual-sided release latches provide quick access to the operation lever for quick adjustments. A rolled toe and angled butt-pad provide positive shoulder purchase while wearing modular tactical gear to make sure you're on target quickly and easily every time. With all these features, the Magpul MOE SL MilSpec buttstock is tailor made for the modern airsoft player. Installing this adjustable stock is quick and easy too, requiring no modification to the airsoft gun.