Gunsmith Cats

Gunsmith Cats (abbreviated GSC) is a 9-volume manga that ran from 1991 to 1997. During that time 3 anime OVAs were produced in '95 and '96'. A second manga series called BURST ran the next decade from 2004 to 2008, with 51 chapters compiled in 5 volumes.

It stars Rally Vincent and Minnie-May.

Chapter 6
First 3 pages and as seen in volume 4:

Chapter 27
Also known as Chapter 1 of volume 4: The Post-Ball Stories