PolarStar JACK / F2 BV309A Bullet Valve — 200 PSI
PolarStar JACK / F2 BV309A Bullet Valve — 200 PSI
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DETAILS
DETAILS
- description
The bullet valve is a working component in the air path, cycling under pressure on every shot. Like any valve doing that job, it eventually wears — and when it does the symptoms look alarming: inconsistent velocity, poor air efficiency, or an engine that will not cycle cleanly.
It is a replaceable part, not a terminal fault. Fitting a fresh valve returns an engine to how it behaved when it was new, which is a far better outcome than the diagnosis usually feels like.
Usefully, the BV309A is shared between the JACK and the F2. One part number covers both platforms, which simplifies things considerably if you run or service more than one. Rated to 200 PSI.
Specifications
| Specification | Detail |
|---|---|
| Type | Bullet valve |
| Model | BV309A |
| Pressure rating | 200 PSI |
| Fits | PolarStar JACK and F2 engines |
| Role | Service and wear part |
| Brand | PolarStar |
Good to know before you buy
Shared across JACK and F2, so one spare covers both if you run either.
Inconsistent velocity or poor efficiency on a previously healthy engine is often a valve rather than a regulator or a leak — worth checking before chasing the problem elsewhere.
Frequently asked questions
Does it really fit both engines?
Yes, the BV309A is shared between the JACK and F2 platforms, which is convenient if you own or service both.
What are the symptoms of a worn valve?
Inconsistent velocity, worse air efficiency than you remember, or an engine that will not cycle cleanly. It is easy to mistake for a regulator problem.
What pressure is it rated to?
200 PSI, which covers normal airsoft HPA operating ranges.
Can you fit it?
Yes, we service JACK and F2 engines in the workshop.