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SilencerCo pistons are designed for easy replacement to fit different host firearms or calibers. They are made from 17-4 stainless steel and heat-treated for maximum durability. The piston is part of the Nielson device, which moves to enable semi-automatic cycling and unlock pistol barrels. Use a Fixed Barrel Spacer for fixed barrel setups. SilencerCo pistons feature female threading that connects to SilencerCo threaded barrels.
| Item # | RSR|SCOAC59 |
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Most in-stock items ship within 1–2 business days via UPS or USPS. Free standard shipping on orders over $99 to the contiguous United States.
All firearms must be transferred through a licensed FFL dealer. We cannot ship firearms directly to you — the firearm will be shipped to your local FFL dealer who will complete the transfer.
Questions about FFL transfers? Contact our team — we're here to help make the process smooth and compliant.
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