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This is a straightforward OEM replacement barrel for your Sig P226 in .40 S&W. It's made by Sig Sauer to the same specs as the factory original, so you get a true drop-in fit without any guessing or fitting work.
Sig hammer-forges these barrels for a reason. The process creates a denser, more consistent steel structure that holds up to repeated firing cycles better than other manufacturing methods. The barrel comes heat-treated to boost toughness where it matters most, then finished with black nitride. Nitride coating resists wear and corrosion significantly better than traditional bluing, and it wears much slower during regular use.
Many P226 owners run their gun in .357 SIG but want a cost-effective way to practice with .40 S&W ammo. This barrel lets you do exactly that. The .40 cartridge is less expensive than .357 SIG and produces similar ballistics at handgun distances. You keep your existing magazines and recoil spring since the P226 platform handles both calibers on the same frame. Some owners also order this when their original barrel has logged tens of thousands of rounds and accuracy has started to slip.
The barrel measures 4.4 inches and features a 1:15 inch twist rate with left-hand rifling, which is standard for .40 S&W. It's chambered specifically for .40 S&W or .40 Auto (same thing). If you own a P226 already in either .40 S&W or .357 SIG, this barrel will fit your frame without any additional parts or modifications needed.
Yes. This barrel is designed to drop into a .357 SIG P226 frame with no additional parts needed. It's a common conversion for owners who want to shoot less expensive .40 S&W ammo while keeping the rest of their pistol setup the same. Your existing magazines and recoil spring work fine with the swap.
No. This is a drop-in barrel that fits factory P226 frames directly. You don't need headspacing adjustments or any other fitting. Just make sure your specific frame is a standard full-size P226, not a compact or other variant.
Nitride is harder and resists corrosion better than blued finishes. It wears slower during use and requires less maintenance over time. Bluing looks traditional and is fine, but nitride will last longer under typical range use without losing its appearance as quickly.
No. This barrel is designed for P226 frames that are already chambered in .40 S&W or .357 SIG. Conversion from 9mm involves additional considerations that go beyond just swapping barrels, so you'd want to work with a gunsmith on that project.
| UPC | 798681221066 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BBL-226-40 |
| Barrel Length | 4.4'' |
| Caliber/Gauge | 40 Smith & Wesson |
| Length | 4.40" |
| Model | |
| Style | Factory Replacement |
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