Sniper Advanced Carbine Military Spec Collapsible Buttstock Black. Reduces metal on metal contact. Great for replacement or new build. Constructed with premium quality polymer. Durable and versatile can attach to either rifle or carbine length tubes. Comes with quick detachable metal sling swivel. Specifications for Sniper Advanced Carbine Military Spec. Collapsible Buttstocks: Manufacturer: Sniper Gun Type: Rifle Condition: New Buffer Tube Size: Mil-Spec Fabric/Material: Rubber Package Contents: Sniper Advanced Carbine Military Spec. Collapsible Buttstock What firearm models does the manufacturer say Sniper Advanced Carbine Military Spec. Collapsible Buttstocks is compatible with? The manufacturer says that Sniper Advanced Carbine Military Spec. Collapsible Buttstocks is compatible with AR-15Sniper AAST07: Advanced Carbine Military Spec. Collapsible Buttstock Black Medium