I don't think it's a reliability issue. I run a 10.5 inch Noveske CQB suppressed without the switchblock with no issues. If you want to reduce gas-in-da-face and carbon build up then go for it. I don't think it's a gimmick. Necessary? No. Cool as hell? Yes. I heard the switch gets HOT after a...
A&D pawn is right down the road a bit. They have a selection. Not sure how high end it is. They're Class III and good folks. Hopefully Bart's is just changing ownership.