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Mfg Item #: SCO AC57
This piston by Silencer Co. is made out of 17-4 stainless steel, and features a 5x36 thread pattern.
| Caliber | 9mm |
|---|---|
| Nfa Thread Pattern | 1/2x36 |
| Additional Feature 1 | Piston for Osprey/Octane |
| Additional Feature 2 | Thread for Colt,RRA,Bushmaster |