ProMag AR-15 10-Round 5.56 Rollermag Magazine w/Roller Follower Polymer Black. 56 NATO 10 rd Polymer Black Finish - 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 10-round 223 Rem/5.56 NATO capacity. Specifications for ProMag AR-15 10-Round 5.56 Rollermag Magazine w/Roller Follower: Manufacturer: ProMag Fabric/Material: Polymer Magazine Capacity: 10 Round Caliber: 5.56x45mm NATO Gun Model: AR-15 Additional Features: Roller Follower Condition: New Package Contents: ProMag AR-15 10-Round 5.56 Rollermag Magazine w/Roller Follower The ProMag AR-15 10-Round 5.56 Rollermag Magazine w/Roller Follower is a quality addition to the ProMag lineup. For more great deals on AR Rifle Magazines by ProMag please browse our Pro Mag Magazines page. What firearm models does the manufacturer say ProMag AR-15 10-Round 5.56 Rollermag Magazine w/Roller Follower is compatible with? The manufacturer suggests that ProMag AR-15 10-Round 5.56 Rollermag Magazine w/Roller Follower is compatible with AR-15ProMag RM-10: AR-15 10-Round 5.56 Rollermag Magazine w/Roller Follower Polymer Black