Barrett Model M82A1 magazines in 50 BMG and 416 Barrett feature bodies manufactured from 1018 cold-rolled steel which are given a moly titanium Teflon self-lubricating finish. Barrett factory magazines feature anti-tilt followers and stress-relieved chrome silicone springs for the ultimate in reliability. Notes: Barrett 416 magazines contain a polymer block forward of the follower inside the magazine body to ensure reliability with the shorter overall length 416 Barrett cartridge.