Maple Leaf MR Hop Up Bucking Double Air Seal 70° For GBB / VSR10 spec

●For GBB/VSR10 spec inner barrel and without modify.
●Addition of a slimmed down black air-seal ring for better efficiency.
●The "Shield" shape groove design has better hop effect when tensioner/lever press it.
●Larger & wider contact area inside of BB pellet, has better hop effect with heavy BB.
●blue 70°