Take your Sig Cross to the next level of precision with the PROOF Research Bolt Action Barrel Pre-Fit 6.5 Creedmoor 20" 1:8" Twist (5 Groove), 5/8"-24 Threaded, Stainless Steel, Drop-In Design for Sig Cross (SKU: 134535 | UPC: 843068134535). Engineered for shooters who demand more from their rifle—whether that’s tighter groups at distance, more consistent cold-bore shots, or rugged reliability in the field—this premium pre-fit barrel delivers custom-rifle performance in a convenient, drop-in package.
Precision-Engineered for 6.5 Creedmoor Performance
Chambered in 6.5 Creedmoor, this barrel is purpose-built for modern long-range and precision shooting. The 20" length offers the perfect balance between velocity and maneuverability—fast enough to push high-BC bullets with authority, yet compact enough for hunting in tight terrain, shooting from unconventional positions, or running your rifle suppressed.
The 1:8" twist rate is optimized for the full range of popular 6.5 Creedmoor bullet weights, especially the heavier match and hunting projectiles that excel at extended ranges. Combined with the 5-groove rifling, this twist profile helps stabilize bullets, reduce jacket deformation, and promote exceptional consistency shot after shot.
5-Groove Rifling for Superior Consistency
Unlike traditional 6-groove rifling, the 5-groove design in this PROOF Research barrel offers several advantages for serious shooters:
Reduced bullet distortion for more consistent ballistic performance
Improved gas seal for better velocity and efficiency
Enhanced accuracy potential with match-grade ammunition
Easier cleaning thanks to smoother internal geometry
The result is a barrel that can help tighten your groups and keep them tight, even during extended strings of fire.
Premium Stainless Steel Construction
Built from high-quality stainless steel, this Sig Cross pre-fit barrel is made to withstand hard use and harsh environments. Stainless construction offers:
Excellent corrosion resistance in rain, snow, humidity, and field conditions
Longevity and barrel life for high round counts
Stable performance across shifting temperatures
Whether you’re shooting competitions, hunting in unpredictable weather, or logging countless hours at the range, this barrel is designed to deliver season after season.
5/8"-24 Threaded for Suppressors & Muzzle Devices
The muzzle is factory threaded 5/8"-24 tpi, the industry-standard thread pattern for most .30-cal and 6.5-cal muzzle devices and suppressors. That means you can easily attach:
This makes the barrel an ideal choice for shooters who want to run their Sig Cross suppressed, tune recoil impulse, or customize their muzzle device setup without additional gunsmithing.
True Drop-In Design for the Sig Cross
This PROOF Research barrel is specifically designed as a drop-in pre-fit for the Sig Cross platform. That means:
No lengthy gunsmith wait times
No complex fitting or machining
Minimal downtime for your rifle
Simply follow standard barrel swap procedures for your Sig Cross, torque to spec, confirm headspace as appropriate, and you’re ready to hit the range. You get custom-level performance with the straightforward convenience of a factory-style replacement.
Optimized for Long-Range, Hunting, and Practical Use
The 20" profile makes this barrel an incredibly versatile upgrade:
Long-Range Precision – Take full advantage of 6.5 Creedmoor’s flat trajectory and excellent wind performance.
Hunting & Field Work – A 20" barrel is easier to carry, shoulder, and maneuver in blinds, timber, or uneven terrain.
Practical/Field Matches – Balance weight, handling, and ballistic performance for dynamic shooting stages and positional work.
Whether you’re punching steel at 1,000+ yards or dialing in a hunting load for your next backcountry trip, this barrel is ready to perform.
Key Features & Specifications
Manufacturer: PROOF Research
Model: Bolt Action Pre-Fit Barrel for Sig Cross
Caliber: 6.5 Creedmoor
Barrel Length: 20 inches
Twist Rate: 1:8"
Rifling: 5-Groove design
Material: Stainless steel
Thread Pitch: 5/8"-24 tpi
Compatibility: Sig Cross rifles (pre-fit, drop-in design)
SKU: 134535
UPC: 843068134535
Why Choose a PROOF Research Pre-Fit Barrel for Your Sig Cross?
Upgrading your Sig Cross with a PROOF Research stainless pre-fit barrel gives you:
Enhanced accuracy potential with match-grade geometry and rifling
Reliable, repeatable performance for competition, duty, or hunting
Easy installation without full custom gunsmithing
Future-proof flexibility for suppressors and modern muzzle devices
Premium materials and craftsmanship trusted by serious shooters
If you’re looking to unlock the full potential of your Sig Cross in 6.5 Creedmoor, this 20" stainless, 1:8" twist, 5-groove, 5/8"-24 threaded pre-fit barrel is a smart, high-performance upgrade that delivers.
"The End"
