The '77 didn't have a concentric piston transfer port set up or a free rotating piston. The TX can be dismantled without taking the trigger out without hardly any pre load . The PE had a far greater muzzle energy and again a free rotating piston and central transfer port compared to the '80. These AA rifles aren't really a rip off of any rifle; at-least I don't think so
Last edited by derekj; 11-02-2017 at 07:57 PM.
I've emailed them at least 3 time when I've had a drink or 10 asking that question about a left handed prosport. Always get the same response that there is no interest!
I need one in my life!
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