Custom Rifle Build: list of parts below. 
Sharps Bros Gen 2 Jack Lower Receiver

Sharps Bros Upper Receiver

Leupold VX-Freedom 1.5-4x20, Pig Plex w/ flipback cover

Odin Works,16" 300 Blackout Barrel w/ 7.62 Atlas Compensator

Superlative Arms Adjustable Gas Block

Aero Precision 15" M-LOK Handguard

Cryptic Coatings Mystic Silver Steel BCG

Radian Raptor Charging Handle

CMMG Ambi Safety Selector

Timber Creek Pistol Grip

Geissele Super 42 Braided Wire Spring & Buffer

PWS Quick Disconnet End Plate

Mission First Tactical Minimalist Stock.

If the add is up, the firearm is still available.