Nice ! I ' ve been buying trim and just making it in my bubble bags . Still a pain in the ass <| sep |> When i wipe my ass paper should drop into toilet by itself <| sep |> I had this problem on two lowers I ' ve built before . One was a polymer and the second was aluminum . JB weld it closed and make sure the channel is still intact and clear by using a 332 drill bit . Once it is repaired , use sandpaper on the tip of the detent to round it out some . Then clip about two coils off the spring that holds it in . Test it out and if you can ' t push the pin in with one finger then trim one coil off the spring at a time until you can . I like to be able to push my rear takedown pin easily with a bullet tip so then you can trim the spring to fit .