None of mine are as accurate as some posted, because I no longer have the abilities some here do.
My tips
Aero M4E1 matched receiver set
Armory Dynamics Stainless Spring Loaded Receiver Tension Screw
H3 or heavier buffer, heavier comes from Slash at Heavy Buffers
Springco Red spring to start, work my way down and order the heaviest spring that allows for function and correct ejection timing
Faxon Lightweight or Toolcraft Nickel Boron BCG
Aero 15" S-One or R-One Handguard
Premium barrel with fast twists
VG6 Epsilon Muzzle Brake
Longest gas system available for barrel being used
CMC 2.5lb 3Gun trigger
The Aero lower has a tension screw, I replace it with the Armory Dynamics Stainless Spring Loaded Receiver Tension Screw, clean degrease, bed the barrel to the action with Loctite 620, then torque to 35ft lbs, once that has cured I will final torque to 50ft lbs. I seal the gas block with Loctite 620, I don't use a suppressor, so I use Loctite 635 to mount the Muzzle Brake
