At the rate things are going this might be a two stamper in a few months..
Put this AR9 together just over a year ago and have been slowly changing parts out over the last several months to make it smoother shooting and more reliable. The hydraulic buffer is a night/day difference over a carbine buffer.
Parts list: -Aero upper/lower
-9in Aero Enhanced M-LOK Handguard, Gen 2
-Cmmg 9mm RDB 8in barrel
-Form 1 multical can, MP tube
-YHM Kutz Kit flash hider and mount
-Blitzkrieg Components Kynshot 9mm Hydraulic-Buffer, RB5007
-Vltor REA5 A5 Receiver Extension RE-A5
-Tubb SpeedLock Systems Flat Wire Buffer Spring
-SBA4 Poston Brace
-Streamlight ProTac with Arisaka mount
-Magpul M-LOK AFG
-Magpul MOE Slim Line Pistol Grip FDE
-BCM Extractor Spring Upgrade Kit
-Odin Works Gen III Extended mag release
-Rise Armament RA-140 on the way