BCA barrel is choking at the throat

[Mopardoctor]

Other problems: 1. The HUGE gas block barely fits inside the handguard and was riding at several points. 2. The rear gas plug has to be filed down on the bottom for the rear takedown pin to line up on an Aero Precision M5 lower. 3. The shipping box had the bolt handle sticking out when it arrived and the handle was scarred up and the handle screw was bent.

Midway sells this same upper for $200 more than what I paid for it.

Mopar Doctor