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Not to put too fine a point on it, but if the piston design is so superior, why isn't someone simply making them from the factory that way? Since you are using a standard AR-15 receiver, you could still call it an AR-15......maybe the AK-15? :P
I don't understand why the piston would need to contact the carrier at an angle. Could you just build the front mount slightly higher and make it align perfectly?
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