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Stag Arms is now offering a new 40 round 5.56/.223 mm magazine which is compatible with all M-16 and AR-15 rifles.
It is constructed of stainless steel and like all magazines they offer it has an anti-tilt follower to prevent jams. Like all Stag Arms products, the magazine is manufactured entirely in the United States. The 40 round magazines looks similar to the 30 round magazine except that the top part of the body above the bend is 2.5” longer to accommodate the extra 10 rounds.