IMO the best Andy Sidaris guns, girls and gadgets flick was his first, Malibu Express. After that one, the plots got dumber, the dialog lamer, and the breasts had alot more foreign substances in them.
I will say that two later entries in the series were notable for having Shae Marks and Julie K. Smith in them. Enhanced or no, they were two of the sexier starlets in the series, and it's hard to argue that Shae unzipping and dropping her tops to show off her whopper-sized implants isn't at least mildly titllating.
A favorite moment from Day of the Warrior is when Shae tells her lover, "I have to get something off of my chest", whereupon she drops her top. Ha ha.