PTS MEC M-Valve — Tokyo Marui MWS and Hi-Capa GBB
PTS MEC M-Valve — Tokyo Marui MWS and Hi-Capa GBB
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DETAILS
DETAILS
- description
The percussion valve is the part that decides how much of a magazine’s gas actually goes into moving the BB and the bolt, and how much simply escapes. It is small, it is buried, and it is the reason two otherwise identical pistols can give very different shot counts from the same fill.
PTS make this one from high-strength brass rather than a softer alloy, and the stated gain is twofold: less gas lost per shot, and a quicker complete cycle because what is released is doing useful work instead of venting. On a gas gun those two things are the same thing viewed from either end.
PTS are explicit that the effect is more pronounced on a steel-slide pistol. That makes sense — a heavier slide needs more energy to cycle, so a valve that delivers its gas more efficiently has more to show for itself. On a light polymer slide the difference is there but smaller.
Specifications
| Specification | Detail |
|---|---|
| Type | Percussion valve, MEC M-Valve |
| Platform | Tokyo Marui MWS and Hi-Capa gas blowback |
| Material | High-strength brass |
| Stated effect | Increased gas efficiency, reduced gas loss, faster cycling |
| Most effective on | Steel-slide pistols |
| Sold as | Single valve |
| Brand | PTS |
Good to know before you buy
It is a tuning part rather than a repair part. If your pistol is not cycling at all, the fault is more likely the magazine, the nozzle or a seal, and a new valve will not hide it.
The gain is largest on a steel slide. On a standard polymer-slide gun expect a smaller change, and treat it as efficiency rather than extra power.
Fitting means stripping the gas route, so it is worth doing at the same time as a seal change rather than as a job on its own.
Frequently asked questions
Will it make my pistol more powerful?
That is not what it is for. It reduces the gas wasted on each shot, which shows up as more shots per fill and a crisper cycle rather than a higher reading on a chronograph. Chronograph after any change regardless.
Does it fit both the MWS and the Hi-Capa?
Those are the two platforms it is listed for. Check the valve you are taking out against it before fitting, as always.
Why brass?
Brass holds a thread and a sealing face well and does not deform the way a softer alloy does under repeated impact, which is exactly the duty a percussion valve has.
Is it worth it on a stock gun?
On a steel-slide gun, yes. On a light slide it is a marginal gain and your money is probably better spent on a fresh set of seals first.