Like M1911 pistols, but didn't like the low magazine capacity? The KWA Double Stack M1911 Pistol Magazine is the best solution. The magazine's double stack design allows any KWA M1911 MK series pistol to carry 21 rounds, rather than the usual 14. The magazine features a larger gas reservoir allowing players to fire more BBs per fill of gas. Couple with KWA's NS2 gas system, this magazine is extremely gas efficient and is an excellent upgrade for any airsoft player looking to get more out of their KWA M1911. Features: - All steel construction - NS2 Gas System is extremely efficient - Double stack design holds 21 rounds - Larger gas reservoir - Fits any KWA M1911 MK I-IV series pistol