Flat top upper receiver with bolt carrier group and charging handle, 20" Wilson stainless steel 1:8 HB. Round count 5,240. Gas journal is .930" dia. Mounted a sling swivel but can be removed with Phillips screwdriver. Please note this shoots Sierra 52 and 53 gr. HPBT Matchkings great (1" at 100yd) but the throat is worn to the point that Sierra 80 gr. bullets can no longer be seated to touch. Selling because I can't use it for cross-the-course NRA match rifle high power competition. Call 360-600-5468 or email tim_roark@Hotmail.com. Shipping an additional $20.