Green Mountain IBS (Interchangable Barrel System) for Thompson Center Drop In 45 cal, New old stock. Barrel measures 1″ ATF x 32″ so will fit the TC 54 cal Hawken or Renegade stock. I don’t believe they make these anymore. Barrel is in the white with no sights. Bolts for under rib, under lug, and thimbles included. Under rib, thimbles, and under lug also included. 1:66 twist rate. Please pay within 3 days or contact me.
