Built for the Ruger-57 and Ruger LC Carbine in 5.7x28mm, the ProMag RUG-A42 is a 20-round magazine engineered with a heat-treated steel body, corrosion-resistant blued finish, and heat-treated chrome silicon wire spring. The injection-molded polymer follower pairs with precision-machined feed lips to ensure a snug, wobble-free fit, while a removable floor plate simplifies cleaning and maintenance.
The heat-treated steel construction resists crushing and delivers exceptional durability through extended use in wet, sandy, and dirty conditions. Its corrosion-resistant blued finish stands up to years of handling without degradation. Machined witness windows allow you to verify round count instantly, and the heat-treated chrome silicon spring combined with the durable polymer follower promote smooth, jam-free feeding.
ProMag backs every magazine with a lifetime warranty, reflecting decades of leadership in handgun magazine manufacturing. Whether you shoot recreationally, compete, or carry professionally, the RUG-A42 provides reliable feeding and proven dependability. Add extra Ruger-57 / LC Carbine magazines to your collection and maximize your time on the range.
