PROMAG FN 5.7X28MM AR 55RD DRUM

ProMag magazines are designed utilizing both traditional stamping and welding of heat-treated high carbon steel” and modern precision injection molding of mil-spec polymer compounds. Every ProMag magazine is backed by a lifetime guarantee against manufacturer’s defects. Made in USA

Does not fit FN 5.7 Pistol
55-round drum magazine
Fits the FN 5.7X28MM AR style carbine
Magazine body constructed of a proprietary DuPont Zytel based polymer
Blue steel upper magazine tower
Injection molded magazine follower
Magazine spring formed from heat treated stainless steel
Made in USA