Re: What we need for the AR shooters...
The follower does appear to be Delrin or something like it. Machining of it wouldn't really be too much of a chore. If I remember correctly, the sheet metal piece in the rear was spot welded and there was some significant adjustment to the feed lips.
AR-10T in .308 & .243 both 24"
700 LA 7 WSM 30" 5R
AR-15 Rock River lower, WOA 26" varmint upper
Savage/ Broughton 23" .308