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Hey guys, i recently purchased 2 fostech echo triggers for a 7.62x39 AR and a regular .223 AR. I've put both through several hundred rounds no issues at all, BUT my 7.62 ar started having light primer strikes. Turns out that their provided hammer spring had worn to the point where reliable ignition wasn't happening. The spring was worn out to the point of being weaker than an ALG reduced power HS. I swapped lowers to my 5.56 rifle and no issues whatsoever. The 7.62 AR has chewed through thousands of rounds of the cheapest combloc ball you feed it and has an extended firing pin because i know it will be brought up. I plan on contacting Fostech tomorrow since their offices are closed but in the meantime i replaced the hammer spring with an XP Wolff one and hadn't had any issues.
 
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