Yeah, that 20mm is a monster. What's the recoil like? More to the point - what's the cost/round? And where do you shoot it?
I have an Armalite AR-50 (and a little AR-15 too, yellow and purple
) - and the AR-50 is at least $5/round. In competition, it costs me closer to $17/round.
That 20mm monster has got to be EXPENSIVE to plink with.
And here in California, you just can't find a place to shoot the 50 anymore.
Nice weapon, though!