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SHS M4 Silenced Bore Up Cylinder Head

SHS M4 Silenced Bore Up Cylinder Head

£8.95
£8.95
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DETAILS

SKU: 72902477
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SHS M4 Silenced Bore Up Cylinder Head — a wider port for bore-up work, with a pad to take the piston's impact. Compression parts work as a set, never alone.

A bore-up cylinder moves more air, and it wants a cylinder head whose port is opened up to match. Pair it with a standard head and the restriction cancels out most of what the bore-up was for.

The silencing pad is the other half of the part. It sits where the piston head lands, softening the impact that makes an unpadded gearbox sound harsh.

It is a matched component rather than a general upgrade. On a standard cylinder it brings nothing, and the pad wears like any other consumable.

Specifications

Specification Detail
Type Cylinder head
Platform M4 / M16
Material Aluminium alloy
Port Bore-up
Seal Double o-ring
Damping Integrated silencing pad
Sold as Single cylinder head

Good to know before you buy

Only worth fitting alongside a bore-up cylinder. On a standard cylinder the wider port gains you nothing.

Frequently asked questions

What does bore-up actually mean here?
A wider internal passage, so a larger volume of air can move through. It is only useful when the cylinder it feeds is bore-up too.

What is the silencing pad for?
It cushions the piston head as it lands, which takes the sharpest edge off the noise a gearbox makes. It is a wearing part and will need replacing eventually.

Will it fit a standard M4 gearbox?
It is cut for M4 pattern gearboxes, but it is designed around bore-up cylinders. Fitted to a standard setup it is simply the wrong match.

⚠ Not a standalone upgrade: a bore-up head on a standard cylinder gives you nothing, because the narrow part of the system is still the narrow part.
💡 Titan Forge Airsoft tip: Change the cylinder, head and nozzle together. Bore-up parts only work as a matched group. Browse gearbox parts.