Selling an Aero Precision upper receiver and 15” Enhanced Handguard with Strike MLOK covers, with 16” Criterion Hybrid .223Wylde barrel, Sons of Liberty Nox 9 muzzle device, and Superlative Arms piston kit with BCG, and BCM Gunfighter ambi charging handle. Everything is new except the barrel which has about 120 rounds through it. $600. Thanks.