My buddy is in dire need of an AR. I have one i don't use that I am considering selling to him. Its a DPMS I paid $1000 for during the Obama scare. I upgraded to a freefloat handguard and stuck a Wilson drop in trigger in it. It runs great and is sub moa. Its got an A2 gas system so I will keep the ARMS buis on the rear too for him. Inthinknit originally had a handguard sight on it. I want to sell it to him for $1000 but want to take the WC trigger out. Whats a cheap option for me to replace it with? Are non drop-in triggers really that hard to install. I see some decent ones go for $40. Any suggestions??