I recently purchased a Thompson 1927A1 Tommy Gun, semi-auto, made by Auto-Ordnance. I am unable to pull the bolt all the way to the rear. It is too hard. I can barely pull it back far enough to cock it, but not far enough to chamber a round. I contacted Auto-Ordnance/technical and they told me there is nothing that can be done. The weapon is a remake of the original Thompson, that was designed to auto fire from the open bolt. Since it is semi-auto, using a double recoil spring operation, the bolt is very hard to pull to the rear. Has anybody else had this problem and does anyone know of a solution to correcting this? The manufacture says I just have to deal with it.