Savior Equipment AR-10/.308 Rifle Mag Holder Gray 5.8 H x 3.75 W. How do we know? We fitted all the AR-10 mags you can think of when we made it. Specifications for Savior Equipment AR-10/.308 Rifle Mag Holder: Manufacturer: Savior Equipment Height: 5.8 in Width: 3.75 in Gun Model: AR-10 Gun Make: AR Platform Features of Savior Equipment AR-10/.308 Rifle Mag Holder Magazine Pouch for 1 AR10/.308 Rifle Mag Hook Backed Panel to Attach on Loop Panel Imported Package Contents: Savior Equipment AR-10/.308 Rifle Mag Holder Savior Equipment MP-TNS-AR10-GS: AR-10/.308 Rifle Mag Holder Gray 5.8 H x 3.75