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Kurtis, Franklin Armory designed this for the Ruger PC Charger so they will be the best source of whether or not it will work in a new frontier C-5 lower receiver. Franklin Armory Customer Service is at Phone: 775-783-4313 (Monday through Friday 9:00am - 4:00pm PT). Cheers and stay safe!

I highly doubt it would work. Doesn't look like the trigger pins or anything would Line up. I'd just get a AR 9 binary trigger. Sorry but hope this helps.

No it wouldn't work, they make an AR specific trigger