Pachmayr (spelling?) the grip and 1911 parts people made one I called the DOMINATOR (do a search, there are some pictures). Springfield Armory had one also. Some of the calibers were .44 mag, .223 and .308. I don't know why they aren't still making them. You would think they would be a great gun for the long distant silhouette shooters but who knows there may be guns that feel better to shoot with those calibers. And they were more a bolt action than a break open . You lifted a lever which unlocked the bolt from the barrel then the bolt fastened to a slide, slid back extracting the case.