I still think that this barrel looks too chunky
The British military registration is also missing.
It’s a pity that the image has such low resolution.
Nr 1: Looks like a suspiciously straight section under the barrel.
Nr 2: I don’t get the impression that there is any reg-plate but the image is too fuzzy
to decide, could be covered by dirt.
As fas as I’m concerned this might just as well be a US owned M110A1.
About discrepancy nr 1, this is the Israeli M107 with the barrel pulled all the way back,
no straight section under the barrel
Compare with M110A1 with barrel forward
Taken from the photo of Proud American (see above)
1: Front end of slide, barrel is in battery
2: Reduction in outer diameter of barrel, well forward of the end of the slide
No visible (bad photo for sure) reduction of barrel diameter.
The netting makes it difficult to see but reduction should be well forward of the end
of the slide and there is no reduction in that position.
The netting starts before the slide ends and goes almost all the way to the muzzle,
even if the netting is thick there should be a visible step.
The M110A1 barrel on the other hand has a short thicker section (band from the slide??) which ends at the forward en of the slide. From the slide forwards the barrel tapers very slightly all the way to just behind the muzzle.
1: bands around barrel
2. Forward end of slide