Beats modifying a legal sporting rifle to keep it legal in unreasonable states. - Franklin Armory AR-15 10 Round DFM Rifle Magazine

I purchased these magazines in both 7.62 and 5.56 for my AR platform sporting rifles. The only modification needed is for the tiny nipple on the end of the bolt catch to be filed off so this magazine can be installed and removed from the top of the reciever. Since the magazine is now fixed the rifle can be stored and used without any further modefications. If SHTF or the sporting rifles become legal again, the magazine can simply be removed from the top and a standard magazine can be used at that time!