You are, I am sure, aware that the term "assault rifle" is a time-honored and specific term referring to a rifle-caliber firearm with selective fire. "Assault weapon" is the term in question here. Do your magazines reference "assault weapons" or "assault rifles"? If the former I shall stand corrected.
From Guns and Ammo..
ASSAULT RIFLES..1982..COMPLETE DATA ON SEMI-AUTOS FROM ARMALITE-BERETTA-COLT FN-H&K...
INTERNATIONAL COMBAT ARMS 1983..ASSAULT RIFLE ROUNDUP: Military and Civilian.
ASSAULT FIREARMS..1984
ASSAULT RIFLES..1992
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SHOOTER’S SURVIVAL GUIDE 1981..Assault Rifles for Defense
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ASSAULT WEAPONS (Publishers of Handgun Tests) 1983..ASSAULT RIFLES.COLT AR 15, RUGER MINI-14,
FN FAL, M1,
H & K, AKM, UZI
Not to mention some of the old SWAT magazines I also have.