Spikehorn - you must have gotten an exceptionally good Ruger Mini 14 and an exceptionally poor AR. Normally, they are not even close. I would get rid of the collapsible stock and the Y-comp - the regular full size stock will give you a much better cheek weld. If you have to have an adjustable buttstock, there is a company in Boulder, Colorado called Magpul that makes an excellent one. The Y comp will blow your ear drums out - and, even with ear protection, is an obnoxious hazard on the range. Have a regular flash suppressor installed. And good luck to you. Roskoe.