GATE EON M4 Hopup Chamber PK227 The first HPA engine controlled

The first HPA engine controlled by an ETU with optical sensors

light weight polycarbonate piston and airtight cylinder allow the gun to stand out as a solid contender amongst the best that airsoft has to offer

One piece metal hop-up unit

Compatible with standard

It has a quad rail system with a monolithic top rail

GATE EON M4 Hopup Chamber PK227 The first HPA engine controlledTitanium + Red version. EON Hop Up Chamber Highly precise CNC machined hop up chamber stuns with FPS precision & consistency, ensures a perfect sealing and BBs feeding. Revolutionary TDC system of hop up adjustment always gives you an ideal and horizontal placement of hop up nub, what makes the BBs' flight trajectory perfectly straight. Tight tolerances of crucial dimensions let for constant FPS level and stable working of the hop up system.