Optimized for PDW-length receiver extensions and developed for those who want a smaller, light stock, the Magpul MOE SL-M Mil-Spec Carbine Stock is the drop-in replacement buttstock for AR-15/M4-mil-spec carbine buffer tubes. Small, nonslip rubber butt pad and angled toe help support shoulder transitions, even while wearing bulky gear. Shielded ambidextrous release latch prevents accidental deployment and minimizes rattle on the receiver extension (no additional locks, levers, or springs needed). 1.25" footman's loop accepts optional M-LOK QD Sling Mount (not included). Drop-in replacement stock for AR-15/M4-mil-spec carbine buffer tubes Optimized for PDW-length receiver extensions Ideal for those who want a smaller, light stock Small, nonslip rubber butt pad and angled toe help support shoulder transitions Shielded ambidextrous release latch prevents accidental deployment and minimizes rattle 1.25" footman's loop accepts optional M-LOK QD Sling MountNOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): Mil-Spec and Commercial-Spec. The MOE SL-M Carbine Stock will fit with the common Mil-Spec tube but is optimized for the shorter PDW-length tubes.