King Arms M4 Metal Hop-Up Chamber for AEG google QD Front Sight (GP889) 5

QD Front Sight (GP889)  5

Foregrip & Pistol Grip

Include 8mm Ball Bearing

Modification may need for installing this kit on the other brand M4 GBB Series

- Vltor Type Front Sight

King Arms M4 Metal Hop-Up Chamber for AEG google QD Front Sight (GP889) 5This One Piece Metal Chamber Set is more durable and accurate in feeding BB Improves Firmness of the chamber & stabilizes the muzzle velocity O Ring Sealed Design to Improve Air Seal Re Designed Hop Up System prevent loosening New Barrel Lock shape for holding barrel more securely Unlike stock plastic chamber which would bend & de shape, this metal one give you rigidity Highly recommend for upgraded Airsoft Electric Gun to withstand higher air