Re: .22 match upper
I've got one of each, a CLE and an AS, both with the M261 kit.
Both shoot in the 3/8 to 1/2" at 50 yrds with good ammo, so take your pick.
You could probably buy a barrel from either for about $30 and put it together yourself,, I would stick to the M261,, had problems with one of the other kits.