Metal M4 hop-up chamber at a Boneyard price
This is a full-metal hop-up unit for the M4/M16 AEG platform, pulled from our Tech It! Boneyard. It is B Grade stock, which means it is fully functional but may carry light cosmetic marks. The performance is unaffected, and the price reflects the cosmetics rather than the function.
Why upgrade to metal
A metal hop chamber resists the flex and cracking that eventually affects worn plastic units under spring pressure. It grips the inner barrel and hop rubber more firmly, which keeps your hop setting stable shot after shot and helps preserve range and accuracy.
Fitment and compatibility
The unit is designed around the Version 2 gearbox M4/M16 AEG and accepts standard AEG hop rubber and inner barrels. Fitment can vary slightly between manufacturers, so it is worth comparing against your existing chamber if you are rebuilding an unusual replica.
Build it or let us fit it
Tinkering at home? This is a perfect low-cost spare for your parts box. Prefer a professional job? Our in-house Kent repair and servicing team can install and tune it for you. Browse more internals and spares in airsoft accessories.
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