Compatible With All Standard Fixed Buttstocks And Most Rifle Magazines, Our Buttstock Magazine Pouch Attaches To Buttstocks With Adjustable Straps For A Secure Hold. Constructed Of Lightweight 500 Denier Ripstop Lid Is Adjustable For 20-Round Or 30-Round Magazines Elastic Forward-Slip Protection Strap On Back Fits Most Collapsible Stock Designs