ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer's defects. Magazine springs are precision wound using heat-treated chrome silicon wire and each and every step of the assembly process is checked and double checked in order to maintain the same consistent level of quality.

• 50-Round Drum Magazine.
• Fits U.S. M1 Carbine .30 Carbine.
• Magazine Body Constructed of a Proprietary Dupont Zytel Based Polymer.
• Hybrid Steel Polymer Upper Magazine Tower.
• Injection Molded Magazine Follower.
• Magazine Spring Formed From Heat Treated Stainless Steel.
• Made in the U.S.A.