Here is a gun magazine for AR-10 guns. This is a 30 round 308 gun mag from National magazines.This magazine is designhed to work in Armalite guns and does not hold the colt open after the last round. Gunclip Depot has the largest selection of AR-10 gun magazines and gun clips. If you do not see the gun magazine you are looking for send us an email and we will try to locate it for you. Buy your gun clips at gunclip depot.