Lyman Great Plains .54 Caliber Percussion Muzzleloader Rifle. The rifle carried across the Great Plains by western pioneers and fur trappers was the culmination of percussion firearms development. This "Great Plains" rifle was designed and built by such famous makers as Hawken, Gemmer and Demick to the specifications of experienced backwoodsmen. Only the best and most reliable designs and finest workmanship were acceptable. Today, as in the 1800's, the experienced black powder shooter is looking for a very special rifle. No other factory assembled rifle or kit offers the authentic style and design of Lyman's Great Plains Rifle. This classic muzzleloader offers such high quality features as a 32" barrel with 1 in 60" twist for patched round ball and a "snail" with clean out screw, separate ramrod entry thimble and nose cap, and reliable coil spring lock with correct lock plate. Factory assembled.