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The Purolator dude showed up today with my 5 cans of MG Chemicals HFC 134A duster. I tried it in my WA pistol, and lo and behold, it works better than the Nexxtech stuff. Not a whole lot better, but seems to give better performance and mileage.
I also installed the old recoil spring from my KJW Metal M9 into my WA (got a new 150% recoil spring for the KJW). It's a lot stiffer than the stock WA spring. I can actually shoot propane in the gun now with a lot less violent slide action than before. I still don't think it's enough to protect it from the propane kick though. I think would need another full 150% spring for that.
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