Modify a Colt MK IV, Series 80, BB gun
How to modify a Colt MK IV, Series 80, BB gun A Colt MK IV, Series 80 airsoft pistol isn't all that great of a BB gun, with it's excessive plastic finish and weak power, but by watching this two-part video, you will see how to mod that BB gun by spray painting it, take a few screws out, stretch the spring, and put it back together. Simple enough, right? Yeah, now try putting it back together. That's it. A modified airsoft gun.
