Check out my page for other items of interest! I accept reasonable offers on most items, combine shipping when possible on multiple purchases, and ship within US only! Features Full metal upper receiver and Keymod handguard 15" Keymod handguard allows for easy addition of Keymod accessories Full length 20mm top rail accepts all 20mm accessories Complete upper set includes inner barrel and hop-up unit Designed to easily be integrated into your AEG 2.5/3 Ronin AEGs Length: 18" Thread Direction: 14mm Negative Hopup: Yes, Adjustable Package Includes: Complete upper receiver, inner barrel, hop-up Manufacturer: KWA