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One suppressor, multiple pistols. That's the whole point of a piston system, and the Dead Air PB444 is the piece that puts your Mojave 45 or Mojave 9 on any host with .578×28 muzzle threads. Since .578×28 is the standard thread pitch on most .45 ACP pistol barrels, this is the piston you grab when a threaded 1911, HK45, FNX-45, or Glock 21 joins the safe.
This piston drops into the PB500 Booster Assembly that comes standard with both the Mojave 9 and Mojave 45, working alongside the internal booster spring to let the suppressor cycle properly on tilting-barrel handguns. That booster action matters more than most people realize. Without it, the added weight of a can hanging off the muzzle keeps a Browning-style action from unlocking reliably, and you end up clearing malfunctions instead of shooting. One thing worth knowing before you order: this piston is specific to the Mojave line. It won't interchange with Dead Air's other pistol cans like the Ghost 45M or Odessa, which use a different piston series.
Even if your Mojave 45 came with a PB444 in the box, plenty of folks pick up a second one. Pistons are wear items that take a beating from carbon and hot gas, and having a backup means a stripped or fouled piston never sidelines your suppressor. It also saves you from constantly swapping pistons back and forth if you run more than one thread pattern across your handguns.
Installation is about as easy as it gets. Unscrew the rear of the booster assembly, drop the piston in, reassemble, and thread the can onto your barrel. The black finish matches the rest of the Mojave lineup, and since it's a genuine Dead Air part, tolerances and thread quality are exactly what the can was designed around. If you're running a fixed-barrel host instead, pair the setup with Dead Air's fixed barrel spacer so the booster stays locked out.
No. This piston is built specifically for the Mojave 9 and Mojave 45 and their PB500 Booster Assembly. Dead Air's other pistol suppressors use a different piston series, so make sure you grab the P-Series version if you run a Ghost or Odessa.
Yes, the Mojave 45 ships from the factory with a PB444 piston installed. Most buyers pick this one up as a spare or to keep a second piston dedicated to another host, since pistons are wear parts and it's handy not to have your can down while waiting on a replacement.
The .578×28 pattern is the standard thread pitch for most .45 ACP threaded barrels in the US. That covers threaded 1911s, the Glock 21, HK45 and USP 45 with US-spec barrels, FNX-45 Tactical, and plenty of aftermarket .45 barrels. Double-check your specific barrel's thread spec before ordering, since some European .45 hosts use metric threads instead.
For tilting-barrel handguns, the piston and your existing PB500 booster assembly are all you need. If you're mounting on a fixed-barrel host like a pistol-caliber carbine, add Dead Air's Mojave fixed barrel spacer (PB139) to lock out the booster action for reliable performance.
| UPC | 810128161923 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | PB444 |
| Caliber/Gauge | .45 Caliber |
| Color | Black |
| Product Type | Piston |
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