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562 Posts
This is an excellent and simple mod for the M28. When I was working heavily with my M28, and was trying to decide what to do with the piston, I employed a similar mod, but much less sophisticated; I filled the huge gap in the piston o-ring groove with white teflon tape:
The works great, but the problem is, the teflon tape gets 'gooey' and begins to deteorate from constant use, and will need to be removed & replaced (R&R). meshootyoubang's mod allows for a more permanent and consistant solution. Imagine how much pressure is being lossed through that "Grand Canyon" of an o-ring groove.
Yes, Cheeseman is offering to have made near stock replacement 45 degree pistons, made from 6061 aluminum. I'm down for one, and I hope that everything comes through, so I can test the piston out. A replacement piston is really what this platform is missing to be a nice shooter. Until thien, this o-ring mod is an excellent fix to help boost the fps of the M28 rifle.

The works great, but the problem is, the teflon tape gets 'gooey' and begins to deteorate from constant use, and will need to be removed & replaced (R&R). meshootyoubang's mod allows for a more permanent and consistant solution. Imagine how much pressure is being lossed through that "Grand Canyon" of an o-ring groove.
Yes, Cheeseman is offering to have made near stock replacement 45 degree pistons, made from 6061 aluminum. I'm down for one, and I hope that everything comes through, so I can test the piston out. A replacement piston is really what this platform is missing to be a nice shooter. Until thien, this o-ring mod is an excellent fix to help boost the fps of the M28 rifle.