The R3L is a longer version of the R3 Flash Mitigation System featuring variable fluted prongs, which yield zero ring and world-class flash reduction. Our R3L utilizes our snag-free, toothless Dual Taper Locking System(TM) making it compatible with all of our rifle and multi-caliber suppressors. *The R3L has a .30 caliber aperture making it compatible with rifle calibers up to .300 RUM* Length: 2.6a ^2