Proof Research 138960 260 Rem 20″ Pre-Fit Barrel for Sig Cross

The Proof Research 138960 is a drop-in, pre-fit bolt-action barrel designed for the Sig Cross platform. Chambered for 260 Rem, this 20-inch stainless barrel features a 1:8″ rate of twist and a five-groove bore for consistent stabilization of a wide range of projectiles. The barrel is threaded with a 5/8″-24 tpi specification and uses Proof Research’s drop-in design intended to simplify installation and headspacing without specialized tools.

Key Specifications

• Chambering is 260 Rem.
• The model is Bolt Action Barrel.
• The rate of twist is 1:8″.
• The barrel length is 20″.
• The finish is Stainless.
• The barrel features a Drop-In design.
• The barrel type is Pre-Fit.
• The bore uses 5 Groove rifling.
• The muzzle is threaded 5/8″-24 tpi.
• Compatible with SIG Cross platform.

This pre-fit barrel is intended for shooters who want a straightforward platform upgrade that supports precision-oriented use cases. Its stainless construction and established twist rate make it suitable for a range of precision shooting and hunting applications on the Sig Cross chassis. The drop-in, pre-fit layout reduces installation complexity while preserving the performance characteristics expected from a purpose-built barrel.