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Sig Barrels

Combat Armory offers 5 drop-in 9mm barrels for the Sig Sauer P320, all priced at $49.99 each. Options include the 3.9" P320 Compact/Carry barrel with LCI and the threaded 4.625" P320C barrel, available finished in Black, Gold, Copper and Plum to suit different builds and personal preferences.

Every barrel in this set is chambered in 9mm and built to match the factory P320 chamber and feed geometry, so it drops into a compatible slide without additional fitting work. Threaded versions use standard 1/2x28 threads for a compensator, thread protector or suppressor mount, matching common accessory threading.

5 products

Sig Barrels questions

Do these barrels fit both the Sig P320 Compact and Carry?

The 3.9" P320 Compact/Carry barrel with LCI covers both configurations. The 4.625" threaded barrel is sized for the P320C specifically. Check the length and model listed on each product page before ordering.

What thread pitch is used on the threaded barrel?

The threaded Sig P320C barrel uses standard 1/2x28 threads, matching 9mm compensators, thread protectors and most suppressor mounts designed for common 9mm handgun barrels currently on the market.

How fast does a Sig barrel order ship?

In-stock barrels ship within 24 hours of purchase, with free shipping on orders over $99 and 30-day returns available on unused, uninstalled barrels that have not been fitted or fired.