Action Army VSR-10 Hop Up Rubber
Action Army VSR-10 Hop Up Rubber
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DETAILS
DETAILS
- description
The hop rubber is where the BB actually gets its spin, and it is the single cheapest part that changes how a replica shoots. A tired bucking leaks air past the BB and loses the contact patch, and no amount of adjustment brings either back.
Action Army make this one from a selected silicone rubber blend. Fitted properly, it is stated to tighten the seal and lift how the BB performs — which is the honest version of what a good bucking does: it holds pressure and it grips.
The fitment list is the surprise. Because it follows Marui dimensions it goes well beyond the VSR-10 and into most of the Marui-pattern pistol range, and a WE gas blowback M4 open bolt is listed among them too. One part, most of a gun bag. The full list is in the table below.
Specifications
| Specification | Detail |
|---|---|
| Fitment | Marui standard replicas: VSR-10, Hi-Capa, Glock, PX4, FN5-7, P226, Detonics, M1911, MEU, SOCOM and similar |
| Also stated to fit | WE GBB M4 open bolt replicas |
| Material | Selected silicone rubber blend |
| Stated benefit | Improved seal and BB performance when correctly installed |
| Origin | Manufactured by Action Army in Taiwan |
Good to know before you buy
Correctly installed is doing work in that sentence. A bucking fitted with a twist or a trapped lip performs worse than the one it replaced, so take the time.
It is a wear part. If the rifle or pistol has done a season and the hop has become unpredictable, this is the first thing to change and the cheapest.
The fitment list is broad because it follows Marui dimensions. If your replica is a clone that deviates, it may not seat properly.
No hardness rating or weight is published by Action Army.
Frequently asked questions
What does a hop rubber do?
It puts backspin on the BB and seals around it. Both of those decide how far and how straight the shot goes.
Does it really fit all those pistols?
It follows Marui dimensions, and the published fitment runs well past the rifle into most of the Marui-pattern pistol range. The table above has it in full.
What hardness is it?
Not published. It is described as a selected silicone rubber blend without quoting a durometer figure.
How often should I change it?
When the hop stops being predictable, or after a hard season. It is a wear part.
Will it raise my FPS?
It can, by sealing better. Re-chrono after fitting rather than assuming it will not.