Seller's Comments and Description:

All new parts. Upper receiver is lapped. Barrel has been dimpled for the gas block. Gas block set screws installed with red loctite. Rearden flash hider torqued to 30 ft/lbs, and I can add rocksett if you like. Magpul MBUS 3 sights. Comes with gas block allen wrench and spare spring and detent, barrel nut wrench, and torx bit for the handguard. M4E1 lower receiver with BCM. $1250 obo. Call or text if interested or if you have any questions. Thanks. Five308four42zero1two Parts list: Aero Precision M4E1 Upper Receiver, Aero Precision M4E1 Lower Receiver, Aero Atlas R-One Handguard, Aero Precision 16" 5.56 Midlength Gas Barrel, Aero Precision Adjustable Gas Block, Ballistic Advantage Gas Tube, Rearden R2S Flash Hider, Aero Pro Bolt Carrier Group, Aero Breach Charging Handle, Magpul MBUS 3 Sights