![Hop-Up chamber for the M4 carbine Hop-Up chamber for the M4 carbine](https://air.viruisis.lt/6598-large_default/hop-up-chamber-for-the-m4-carbine.jpg)
Hop-Up chamber for the M4//M16
The Hop-Up chamber is made of plastic and it is a full set chamber for the M4/M16 type replicas. The Hop-Up chamber set includes a Hop-Up rubber and all of the parts necessary to mount it in the replica's chamber.
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