For those that actually have, or have had them, what's your verdict: good bad, ugly???? Not considering cost as a factor.
MM
Certainly superior to direct impingement in terms of keeping the crud away from the chamber and bolt carrier region. All crud and soot stays in the piston and gas block area. This makes it more reliable under conditions where frequent cleaning of the action isn't possible.
My Sig P-516 G2 has been 100% after over three hundred rounds. Groups are running around 1.25" at 100 yards with PMC Bronze 55 grain ball, using an informal bench rest.
