A friend of mine builds and collects AR-15s. He recommended a company he uses called JARD inc. for a trigger upgrade for my Tac. They are substantially cheaper than the other widely used option, I believe almost half the price. My question is, has anyone tried them? my friend swears by the quality. Will any AR-15 trigger fit in these Tacs? I was looking at the 3lb two stage trigger. Any comments will be appreciated..... Thanks guys!