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A suppressor is only as good as the piston connecting it to your barrel, and this is the genuine article from Yankee Hill Machine. The Sidewinder piston in .578×28 is the factory replacement for YHM's Sidewinder .45 ACP suppressor system, threaded in the most common pitch you'll find on .45 caliber pistols. If your threaded 1911 barrel or aftermarket Glock 21 barrel wears .578×28 threads, this is the piston that ties it all together.
Pistons are wear items, plain and simple. Every shot cycles the booster assembly, and over thousands of rounds the threads and bearing surfaces take a beating from carbon, heat, and friction. Having a fresh piston on the shelf means a worn one never sidelines your can in the middle of a range season. It's also the smart move if you run multiple hosts. Rather than swapping one piston between guns, a lot of Sidewinder owners keep a dedicated piston set up for each pistol so mounting up takes seconds instead of a cleaning session.
This piston carries manufacturer part number YHM-3225-28 and is machined by Yankee Hill in Massachusetts to the same spec as the original component in your Sidewinder. That matters with Nielsen-style boosters, where tolerances directly affect reliable cycling on tilting-barrel pistols. Drop it into your Sidewinder booster housing, thread it onto your .45 host, and you're back in business. One thing worth knowing: this piston is sized for the Sidewinder system specifically, so if you're running one of YHM's other pistol cans that uses the standard Nielsen piston line, double check which piston family your suppressor takes before ordering.
Simple part, important job. Whether you're replacing a piston that's seen better days or setting up a second host, this is the no-guesswork way to keep a Sidewinder mounted right.
.578×28 is the standard thread pitch for most .45 ACP threaded barrels, including threaded 1911 barrels and aftermarket barrels for pistols like the Glock 21. As long as your host pistol has a .578×28 threaded barrel and your suppressor is a YHM Sidewinder, this piston is the right fit.
This piston is sized for the original Sidewinder suppressor system. The Sidewinder M2 and YHM's other pistol cans use the company's standard Nielsen piston line, which is a different part. Check which piston family your specific suppressor uses before ordering so you get the right one the first time.
There's no set round count, but pistons are wear parts. Inspect yours during regular cleanings and look for worn threads, excessive play in the booster housing, or sluggish cycling on your host pistol. When you spot any of those signs, swapping in a fresh piston is a quick fix that restores reliable function.
You only need one piston per thread pattern, so a single .578×28 piston covers all your .45 hosts with that thread. That said, many suppressor owners keep a spare on hand so a worn or damaged piston never takes their can out of commission, and some dedicate a piston to each host to make swapping faster.
| UPC | 816701019049 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | YHM-3225-28 |
| Caliber/Gauge | .45 ACP |
| Package Height | 1.2 |
| Package Width | 3.2 |
| Shipping Weight | 0.1 |
| Product Type | Accessory-Silencer Accessories |
| Length | 5.5 |
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