SHS Piston — 14 Full-Width Steel Teeth, Metal Rack
SHS Piston — 14 Full-Width Steel Teeth, Metal Rack
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DETAILS
DETAILS
- description
A piston with all fourteen teeth cut in steel rather than moulded into the body. Nothing on the rack is polymer, so there is no soft tooth sitting there waiting to be the first one to go.
Teeth strip when the load gets ahead of the material. Heavier springs, higher rates of fire and full-tooth gear sets all push that load up, and a moulded rack is usually where a build gives out first.
The trade is weight. Steel across the whole rack weighs more than polymer, which costs a little at the very top end of the rate of fire. On a torque build that weight is rarely the limiting factor.
Specifications
| Specification | Detail |
|---|---|
| Type | Piston |
| Teeth | 14, full width |
| Rack | Full steel |
| Body | Reinforced polymer |
| Fits | Version 2 and Version 3 gearboxes |
| Sold as | Single piston |
Good to know before you buy
Full-tooth pistons want a gear set that agrees with them. If your sector gear has teeth removed for pre-cocking, count them against the piston before you close the shell.
Frequently asked questions
Will this drop into a stock gearbox?
Yes, on a standard Version 2 or Version 3 shell. It is sized like the piston that came out of it.
Do I need a new piston head as well?
No. The head from your existing piston will transfer if it is in good order. Change it at the same time if the bearing feels rough or the face is marked.
Is steel worth it over polymer?
On heavier springs, yes. Below roughly M110 a decent polymer rack holds up perfectly well and runs a touch quicker.