Congratulations, Killdozer. That really looks like the one, with the wire even. :confused Find out what gauge that is.
And to think that I missed that a few weeks ago when I was staring at guns like crazy... :$
OK... OK.... I've followed many paths leading to dead ends, but if Serafino is excited enough to REPOST my discover, I guess I'm finally on the right track. :lol
The caliber I know: .303 a UK standard, and apparently, in my research so far, uncommon.
I tried to do some scaling of exoray's fine photo (which I can't believe. the one I posted was the best I could find.), but without success. However, here's a pic which made me go "ah hah.", or at least, "not bad.":
Now, nobody wants a blowup like on the flash hider thread. I don't particularly care if I get an original part myself, but let's all play nice for now, and not flood potential suppliers with emails. I've started a list of contacts-- PM me if you'd like to participate this way.
Thanks may not quite be in order yet, but I wouldn't have gotten this far without the TOP NOTCH cooperation of you lot.
I am far from an ammunitions expert, but would a .303 make a decent anti-aircraft round. I know it was used for the enfields (shown in the picture in that link), but I would think those big guns would use something like the british equivalent of the 50 cal. (and it looks like there's a strip of them near the .303s)
Those guns are definitely not anti-personnel. If anything, they'd be either anti-armor or anit-aircraft. And if it's the latter, either plane mounted or tri-pod or trailer mounted (for a mobile platform), probably in groups of four.
If you go to the url below and scroll down through the posts, you'll find some interesting facts and figures on the Colt-Browning 0.303 machine gun and a great picture that should confirm the heat sink to definitely be the Obi-Wan "gear" if there are still any doubts.