We are proud to be a KRG Dealer and offer these steel AICS Magazines. We only offer the versions without the binder plate to maximize the COAL as much as possible. All are ffered in 5 round configuration only, Max OAL is as follows:
.223 = 2.325" COAL. Mag length 3.055" 
.308 = 2.950" COAL. Mag length 3.055"
30-06 = 3.750 COAL Mag length 3.850"
.300 Win Mag = 3.750" COAL. Mag length 3.850"
300 RUM = 3.750" COAL Mag Length 3.850"
.338 Lapua= 3.750" COAL. Mag length 3.850"
 
223 and 308 are DSSF, All others are SSSF. 
7PRC and 300PRC Should use 300 RUM mags.