Promag Rollermag for the AR-15. The maximum capacity for this magazine is 40 rounds. .223 Remington, and 5.56 NATO caliber magazine. Black polymer housing with a roller follower attached to the music wire hi-tensile spring to enhance magazine feed.
ProMag's Rollermag reinvents the wheel by adding them to an anti-tilt follower, in a Technapolymer magazine body. Experience a smooth, anti-tilt rolling feed with the revolutionary RollerFollower for maximum friction reduction. The magazine is built with ProMag's anti-fatigue chrome silicon springs, so you can keep them loaded and stashed for up to six years without worry. This model has a 40-round 223 Rem/5.56 NATO capacity.
One characteristic about Promags reputation is the process and dedication that goes into their manufacturing process and that has held true since their conception. This dedication to only turning up superior and dependable products for whatever occasion, has kept their integerty strong and reputation solid for many years.