RE: 1 pin site vs. multiple pin site
 

Just for giggles take a look at the HHA Triple Threat.

RE: 1 pin site vs. multiple pin site
 

I use the HHA single pin micro adjustable sight... Ive always shot 3 pins until i bought this one, and i will never go back, i have it set a 27yrds, and i can shoot out to 35 with it. First deer i shot this year was 56yrds, simply moved my pin up to the 55yrd mark. Would have had to guess with my old 3 pin sight... But i would say biggest thing i like is there is not all those pins blocking my vision, and the HHA is so bright i can shoot it right up until dark with no problems.

RE: 1 pin site vs. multiple pin site
 

sur-lock makes a 3 pin sight that also slides like a single pin. one negative to the hha, if you're using the site light, the pin housing is so deep that it creates a glow inside it you can't see through.