The Riley Defense RAK308-C .308 Win 20-Round Surplus Magazine is a genuine M77 rifle magazine featuring an all-steel body with a corrosion-resistant and anti-friction matte black finish for unparalleled durability. The durable steel spring and polymer follower facilitate smooth, jam-free operation, while the flat steel floor plate offers improved shock resistance for protection against bumps, drops, and other hazards. If that's not enough, this magazine is machined to ultra-precise tolerances for a snug fit, reliable performance, and consistent feeding in any shooting application.