CAA AR15 M16 COLLAPSIBLE BUTTSTOCK MIL-SPEC TUBES Upgrade your standard collapsible buttstock with our innovative one. - Storage compartment for CR123 batteries - Side Picatinny rail – allows addition of adjustable cheek-rest #ACP or 12ga’ shell holder #SSM - Rubber non-slip buttpad with tapered angle, allows faster shouldering and increased comfort with body armor - Two ultrasonically welded metal quick release sling mount points - All can be easily fit to both left/right handed users - Available for mill standard (#CBSM) or commercial tube (#CBS) Weight: 0.79 lbs Width Max: 1.69" Height Max: 5.12" Length Max: 7.48" Color: Black