Hi there, I have a Browning Hi Power MKIII at Action Works getting a makeover. It's been a year, so I'm hoping to get it soon! Also have a BPS I try to shoot birds with. Trying to get some help for a buddy to order a mag for his browning rifle. It's a 7mm Rem Mag, and serial is: 05864PM177. Is this an A bolt? Original or 2? Just found out it's a BBR. Any idea on magazine compatibility?