You need other items too - Fostech Echo AR-II Drop-In Binary AR-15 Trigger

Great trigger BUT...Militia state armory Echo 2 tuning kit is a must have. lowers the 7lb pull down to 3ish lbs and makes the trigger run more reliably. You will also need a good muzzle brake if you expect to hold it on target because with some practice you will be running a cyclic rate similar to full auto. With a good brake double taps in the A zone are easy. Also put some anti walk trigger pins in your cart. Mine were vibrating out after 400 rds. Which leads me to my next recommendation. Mags and ammo. Your'e going to need more than you think. For me, the addition of a vertical foregrip was necessary. And lastly, bring your shooting gloves to the range because your barrel is going to be hot. Great trigger after the MSA upgrade kit. GAURANTEED to make you smile, enjoy.