Quote by m3bobby View Post
Its actually a Hispano cannon in 20mm. the .5 is 12.7mm so 7.3mm diffrence. The 20mm is a little more potent! Makes for better target practice.
OOPS, I certainly did make a mistake there. No wonder the 55 gallon drum blew up a bit more than I expected. I stand corrected. First mistake of the day (that I know of).