Midwest Industries Stock Tube Adaptor 6.75 in Picatinny Anodized Black. Specifications for Midwest Industries Stock Tube Adaptor Picatinny: Manufacturer: Midwest Industries Condition: New Color: Black Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Fabric/Material: 6061 Aluminum Finish: Type III Hard Coat Anodized Country of Origin: USA Features of Midwest Industries Stock Tube Adaptor Picatinny Super easy installation 6 position Mil-spec diameter tube Easily accessible water proof storage in tube Super clean compact design Package Contents: Midwest Industries Stock Tube Adaptor Picatinny What firearm models does the manufacturer say Midwest Industries Stock Tube Adaptor Picatinny is compatible with? The manufacturer suggests that Midwest Industries Stock Tube Adaptor Picatinny is compatible with AR-15Midwest Industries MI-STAP: Stock Tube Adaptor 6.75 in Picatinny Anodized Black