yep burris has the 3x12, and i reckon they quit makin the 3x9 model. they are super nice, imo!
something you could try, before layin down the cash.......a riflescope(maybe one ya already have). thats what i shoot on my 14" .223. i kinnda like it after trying it. it does give a wide field of view. you just have to be careful......possibly shoot low recoil loads, and adjust for different shooting positions.
i shoot blue dot powder and 40 gr nosler bt's at around 3000-3100fps with great accuracy, and much less muzzle blast. recoil is less with this load, and does make the short eye relief easier.