Sig P320 Parts & Sights

Sig P320 parts: grip modules, slides, barrels, triggers, sights and X-series upgrades. Ships to your door where legal.

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Buying Sig P320 Parts & Sights online

The P320 is built around a serialized fire control unit (FCU) that moves between grip modules and slides. Change the size, caliber or feel of the gun with a new grip, slide or barrel.

Match slide and barrel lengths and the optic footprint to your build. Shop P320 holsters.

Sig P320 Parts & Sights FAQ

What part of the P320 is the firearm?

The fire control unit (FCU) carries the serial number and is the regulated firearm. Grip modules, slides and barrels are parts.

Can I change my P320 to a different size?

Yes. Swap the grip module, slide and barrel to change the size, and move your FCU into the new grip.

Do gun parts ship to my house?

Most parts, sights and accessories ship straight to your door. A frame or receiver is the regulated firearm and ships to an FFL. Some states restrict certain parts, which the product page lists.