THE NEW X-RING OPEN SIGHT .22LR BARRELS ARE MACHINED FROM 6061-T6 ALUMINUM” THE PREMIUM X-RING BARREL HAS BEEN DESIGNED TO MAKE YOUR RUGER® 10/22®  RIFLE LIGHTER AND SIGNIFICANTLY MORE ACCURATE. THE X-RING BARREL FITS ALL RUGER 10/22 RECEIVERS AND MOST AFTERMARKET 10/22 STYLE RECEIVERS.   ACCURACY IS ENHANCED BY A RIFLED CHROMOLY STEEL LINER WITH A POLISHED 11 DEGREE CROWN.  THE X-RING OPEN SIGHT BARREL COMES WITH AN ADJUSTABLE GREEN FIBER OPTIC REAR SIGHT AND GREEN FIBER OPTIC FRONT SIGHT.