450Bushmaster.net

I just got my ruger 450 bushmaster ar it will feed a round in and when u fire it will not eject the casing but u can manually cycle and it will eject fine any help is appropriated

Does it strip the round from the chamber, but doesn't eject it out?

First thing I’d check for is weak extractor spring, but with a new rifle I’d contact Ruger. Their customer service is the best in the business, and they’ll get it repaired quickly.