The AR IS Aero precision upper and lower multi cal. 10.5" barrel . Super low round count only one mag has been put through it, I have swapped the trigger to a Rise 3.5lb flat face  drop in, I  still have the package  it came in.  Also swapped to a 45  degree selector. Optic is a vortex crossfire red dot.  And a folding brace adapter. Super smooth and clean build Text is best is you have any questions REDACTED  Thanks for looking