Ruger Mini 14/30 Accu Strut Socom 4" in Blued Steel 1 Clamp Reduces group size 50-75% for most older rifles with straight profile barrel and up to 33% for newer, tapered barrels Limits hot-barrel "stringing" Decreases load sensitivity Installs in minutes...100% bolt-on performance...no tuning or adjustment necessary (point-of-impact maychange) 4" Weight: 5.6 oz.