This one is gonna hurt a bit but it needs to be said. Fix the trigger nut - that would be the nut behind the gun.
Abner Miranda is a former Police Officer of 6 years, an FBI trained Hostage Negotiator, a First Responder, and Spanish Interpreter. He is currently a Firearms Instructor, an Armorer, and a regular contributor to our industry of both written and digital media. He is an AR-15 rifle designer and takes great pride instructing friends, family and fellow law enforcement agents.