Tactical buttstock with integrated AR 5.56 magazine carrier - Optimized for a rapid magazine change - Multi textured rubber butt-pad for a secure shouldering during rapid fire - Interchangeable buffer tube adapters for a tight fit on Mil-Spec and Commercial buffer tubes - Integrated cheek weld optimized for the M4/AR15 platforms - Provided with one Ultimag 10 round AR magazine - Includes ambidextrous quick detach rear sling swivel connectors - Compatibility: - Compatible with both Commercial and MIL-Spec buffer tubes - All standard 5.56x45 (.223 Remington) AR15/M16/M4 steel magazines