I don't have time to view all of the comments... this being said
Keep your stock trigger and try this for $11 before dumping $ into something you might not shoot often...
http://www.midwayusa.com/product/57...igger-spring-kit-ar-15-3-1-2-lb-reduced-power
^^^^^This^^^^^ just do some polishing drop these in with the hand grip set screw mod and your good to go. Did it to all of mine and have people ask me ALL the time which custom trigger I have. If your not gonna be competing then this is your best option for the money. Zero creep no Grit and I have had 100% primer ignition. That and a 3lb trigger make it a winner in my book. Also, notice I said polishing and no stoning to the internals. Unless you know what you are doing.