This is a n OEM Sig Sauer MCX (Rattler) .300 Blackout Piston Kit and is compatible only with 5.5" Barrels.
Internal Reference:
KIT-MCX-PISTON-5B-300
Barcode:
798681591145
| Brand: Sig Sauer |
| Model: MCX |
| Caliber: .300 Blackout |
| Firearm Action: Semi-auto |
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