The 30mm DU(NR) round fired by the gun is about the size of a coke bottle.
Oh, and yes, the A-10 was a spy plane. Kinda. When the SR-71 was first developed, there was an armed super long range attack version known as the A-10. It never became operational though.
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2006 Redline Red Nissan 350Z Base
K&N|Falken
I am just that JDM tight, yo.