To those on the fence.

Do remember that this is someting that is fairly easily reversable. Tim takes a barrel with a nasty muzzle and cuts the nasty end off. He modifies an op-rod, a follower rod, the band and the stock ferrule. He leaves out all the front handguard bits and needs to take a bit of material out of the barrel channel of your commercial stock.

The small parts are plentiful and reasonable. Junk barrels are recycled and you can always reverse it if you want to. I can't imagine why you would want to after you play with one. Mine in on an uber-low 4 digit receiver with a WRA op-rod and lots of very early and some National Match parts. I love it just the way it is.