FAB Defense GL-CORE M CP with Built-In Mag Carrier AR15/M16/M4 Buttstock - Black - The CORE M CP has a built-in concealed AR15/M16/M4 Magazine Carrier that will accommodate all standard 5.56x45 (.223 Rem) AR15/M16/M4 and FAB Defense Ultimag Magazines. Whether its your accuracy or numerous target engagements, you can depend on your last ten chances with the FAB Defense "Survival" AR15 Butt-stock withBuilt-in 10 Round Magazine Carrier and an adjustable Cheek Piece. The CORE M AR15 Stock has a unique Anti-Rattle mechanism that holds the stock firmly in place on your AR15 tube eliminating any unnecessary rattle, furthermore the butt-stocks butt-pad in made out of a high-quality rubber to prevent it from slipping while shooting and enhancing the grip on the shooter's shoulder. The stock will fit both MIL-SPEC and Commercial tubes. 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 Front part of the CP can be adjusted to 3 different height levels