If you are looking to upgrade your HopUp assembly, this is hands down the ultimate setup for 4.3 Hi Capas. It includes the following:

• Maple Leaf HopUp Chamber
• Maple Leaf Adjustment Bar
• Maple Leaf I-Key
• Maple Leaf HopUp Adjustment Wheel
• Maple Leaf 2021 Silicone Decepticon 70 Degree Bucking
• Maple Leaf 6.02 Tight Bore Inner Barrel

This is truly an all in one barrel setup, get yours while they last!