Neon Prime
Copper BB
Just picked up a used Mossberg 500AB 12 gauge pump in good condition. This is my first gun so I'm trying to learn as much about it as I can. Serial number is G412XXX. The only thing I've done is replace the optics/side saddle studs with Mossberg 500 pin and ejector screw. The magazine tube cap will not budge so I haven't been able to do a complete inspection/cleaning. Happy to finally own a Mossberg so any help would be appreciated.