The Colt’s Match Target® CR6720 in 5.56×45 NATO has a 20″ stainless steel heavy barrel while some of the others Match Target rifles have chrome lined. It has 6 grooves with a 1 in 9 right hand twist. This means that for every 9 inches the bullet makes one complete turn. The Colt Match Target® CR6720 is 39″ in length and has a fixed full-size rifle stock. The gun weighs in 9.3lbs. This gun also handles the standard .223 remington bullets.