.50 Cal, .52 Cal. Current Bighorn line uses ignition system of full plastic jacket, Western No. 11 & Musket Cap Nipple. Twist rates for Green Mountain barrels are 50/1:28", .52/1:26", 26" stainless steel. OAL 44.5", LOP 14.25". Weight (thumbhole) 8.1 lbs., (straight) 8.5 lbs. Williams fully adjustable metallic fiber optic sight set, adjustable trigger. Realtree camo patterns. Ramrod is Easton Carbon Core Ramrod with reverse threaded extendable full brass jag. DynaTek coating on bore and exterior of the barrel.