The popular product launched by T-N.T. STUDIO : GHK-AR upgrades the dual-purpose HOP chamber, which can be adjusted quickly and easily by using the adjustment knob in the same way as the original (Type A). If the player has replaced some styles of handguards, it is inconvenient to use the adjustment knob, or when the handguard style is not convenient for quick disassembly and assembly, the HOP adjustment method can also be changed by replacing the adjustment knob : use a 1.5mm hexagon wrench to adjusted HOP-UP in upper receiver. HOP bucking can be used with T-HOP, TR-HOP or H.L.R. bucking according to the type of BB used by individuals, and with S+ precision dual inner diameter eclipse air-cushion inner barrel,  and the shooting performance is even more better!!

【T-HOP bucking】:
●Standard HOP-UP bucking.
●Suitable for use with medium-weight to heavier BBs.
●Medium ~ long-range shooting.

Features :
●The one-piece HOP chamber made by CNC is accurate and does not shake, and the installation steps are simple and fast.
​●Change to use GBB spec bucking,  which has better air-seal.
●Fix the BB reload position to ensure that the reload position is consistent and the shooting performance is more stable.
●Adopt T-N.T. positioning nub design to avoid the displacement due to vibration. Available in 70 degrees and 80 degrees.
●Dual-purpose HOP chamber: Adjustable knob (type A), or spring type (type B) is available. Players can choose the appropriate style to use according to the form of the handguard.

Supported models:
GHK-AR GBBR series.
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※Inner barrel material: bronze & electroplated chemical nickel.

※All retrofit kits are assembled by our professional technicians, but there may still be slight tolerances between different batches of airsoft guns. It is recommended that you must have relative DIY ability before purchasing.※