Just got an Axis .223 and modified the trigger similar to the process in the predatormasters forum. I used a set screw with some loctite and threaded it into the existing 10-24 threads in the trigger. I used a lighter spring, cut down to a good length, and the trigger feels great now, and passes a drop test. I haven't measured it, but I'd guess 2.5 or 3 pounds.