Hi!
I'm looking to make the howitzer barrel off the M108 SPG (M103 gun) but the only barrel I could source was the M2A1 barrel off the old M4A3 Sherman.
Now, it's actually the same gun (sorta). I'm prepared to live with the different profile but I'm kind of stumped as to how to make the muzzle brake and the bore evacuator.
Here's an image of the part and the weapon.