I am going to be ordering a couple custom bbls. for a Tompson Centre Encore/Prohunter hand gun. Calibers .357 Mag and .454 Casull. I thought I would go with open sights but want to have option to put a scope on the bbl. I have 2 hand guns with HG scopes but have been looking at these red dots, don't know a thing about them. The TC Encore rifle bbls come drilled and taped for a weaver scope mount.