ProMag AR-15/M16 .223/5.56 NATO 40rd Rifle Magazine, Black - COLA35

ProMag COLA35 is a 40-round steel and polymer hybrid magazine chambered in .223 Rem/5.56 NATO, designed for AR-15 and M16 platforms. Features a heat-treated black oxide-finished steel feed tower, shockproof DuPont Zytel polymer body, and high-tensile chrome silicon wire spring for reliable performance in high-round-count scenarios.