It must be, seeing as it has a cannon mounted on its right shoulder, a 2-barrel hand beam gun, and a green and orange color scheme, all of which are good indicators of the FA-78-1 Full Armor Type.
Also, rock on Zakrello, you silly and ugly as sin MA.
Hey, I love Zakrello. It's so weird and such an outdated style (a breach in design trends, if you will), it should have been in Gatchaman rather than Gundam.