The Barton Barrel is 1" until the last 4" when it flares to 1.25" so he had to machine the support block to take it. The baffles unscrew out of the muzzle for cleaning .
He had the lower channel hard anodised in grey to match the Barton gunworks fully shrouded and silenced match barrel.
IOR 1-10x26 scope on top and a carbon bipod underneath