Autocannon for Sentinel

Needed an autocannon for the sentinel model by andralex10 so I made one that fits my army (you can find the original sentinel here : https://www.thingiverse.com/thing:2766870 )

Update 1 : Added option for larger barrel


Also fixed the smokestacks on the sentinel so they can be printed, and as I print mine merged thats what's in this pack!

If you want the original, please check out andralex10's page!

(Should be printed at 130%, my photon S buildplate only managed 125% but that looks fine)