I'm just starting putting together an AR for the first time and I'm having a great time doing so. I've decided to build up the lower myself and already have an upper, my question is which trigger set up do I need? This rifle will be purely tactical in purpose, home defense, range, training hopefully. I'm not sure the difference between a two and single stage trigger and the advantages of each. If you guys could give me any info it would be much appreciated!

