Brand: Vism Includes: AR thumbhole stock with internal storage compartment, rubber butt pad, featureless plate Materials: Polymer and hard anodized aluminum Compatibility: MIL-SPEC Rifle with Carbine Length Tubes Weight: 10 oz Color: Black or Flat Dark Earth Warranty: Lifetime This is a drop-in replacement adjustable stock for AR15/M16 carbines using MIL-SPEC sized receiver extension tube. Designed to only fit MIL-SPEC carbine buffer tubes.