I have a Burris 3-12 xtreme tactical. Bought it new a couple years back, sits atop my 6x45 dtech AR-15. Seen two trips to Montana for pdogs and multiple trips to the range. Glass on this scope is VERY nice, I prefer it to leupold mark 4 glass. I just upgraded to nightforce and this one is not on any rifle. Willing to trade for your bushmaster.