Presma Skeletonized 223/5.56/308 Buttstock Mil-Spec Tube 6 Position Purple. Specifications for Presma Skeletonized 223/5.56/308 Buttstock Mil-Spec Tube 6 Position: Manufacturer: Presma Gun Model: AR-10 AR-15 Gun Type: Rifle Features of Presma Skeletonized 223/5.56/308 Buttstock Mil-Spec Tube 6 Position Fits Mil-Spec Adjustable Buffer Tubes Trigger lock type adjuster Includes 2 QR release holes Recoil pad included Package Contents: Presma Skeletonized 223/5.56/308 Buttstock Mil-Spec Tube 6 Position Aluminum buttplate Buttpad What firearm models does the manufacturer say Presma Skeletonized 223/5.56/308 Buttstock Mil-Spec Tube 6 Position is compatible with? The manufacturer says that Presma Skeletonized 223/5.56/308 Buttstock Mil-Spec Tube 6 Position is compatible with AR-15 AR-10Presma AAST25-PUR: Skeletonized 223/5.56/308 Buttstock Mil-Spec Tube 6 Position Purple