Aero M5. 16" dissipator setup. BA 16" barrel. Lower is all Aero parts w/ CTR stock and magpul grip. Upper has nitride bcg, ambi CH, adjustable seekins gas block, yhm folding sight/gas block (just a sight base and hand guard retainer, gas block is under the handguard) with folding rear sight. $900. If you just want a standard CH, $860. I've put approx 180rds through it. Had an issue with a too long buffer spring but once that was solved it's been great with XM80. I'll need a 4473 filled out.
Optic and Muzzle device not included in the price.