The Proof Research drop-in bolt action barrel is pre-fit for the Sig Cross in 308 Win. It has a 20-inch 5-groove carbon fiber barrel with 1:10 twist and 5/8x24 threads.
- Manufacturer Part # : 134481
- Type : Bolt Action Barrel
- Caliber : 308 Win
- Length : 20"
- Bore Type : 5 Groove
- Thread : 5/8x24
- Finish : Carbon Fiber
- Fits : Sig Cross
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