LSP Brand barrels for High Standard Frame

Has anyone had any luck using LSP Brand replacement barrels on their High Standard? They are sold by Brownells' and you can also buy them factory direct for the same price from LSP in Vermont. I'm looking to buy a 5-1/2" bull barrel replacement for a Victor and use the LSP Scope Mount on their barrel to put a Red Dot on the gun. I couldn't help but notice the lesser price between the LSP barrels / Scope Mounts and those of High Standard, also sold by Brownells. Any help would be greatly appreaciated.