was going to buy a bunch of these and sell them but decided its not going to work for me so here is the info so you can purchase on from manufaturer....
this tool is used to rmove the detents in the tube for installation of mag tube extensions... I have used it many times and it works great !
PN 80-2283T-817-1 retails for $20 + S&H. Call the toll free order line to get one.
re check the listing I put purchase info in it..... MODS........sorry for the post thought i hit Im .....appologies