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It's an echo 1 st6 which is a basic m4 pretty much. I downgraded the spring to a m90 spring but the piston is still stock. The third tooth is worn down because I'm correcting the aoe, here's some more pictures...
[IMG]991212_278481365630662_208163711_o.jpg[/IMG]
[IMG]989086_278481238964008_1555170283_o.jpg[/IMG]
Should I just get the echo 1 piston again, or should I get a different one?
Last edited by ZanderFTW; June 1st, 2013 at 16:27..
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