sig p320 compact 9mm striker-fired pistol, 3.9 in. barrel

Sig Sauer P320 Pistols

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SIG P320 Pistols

The SIG P320 is SIG’s modular striker-fired pistol. The serialized part is the fire control unit. Compact, full-size, XCompact, XCarry, XFull, XFIVE, AXG Legion, Spectre Comp, XTEN, FLUX, MAX, M.O.D., and Custom Works FCUs hang different slides and grips on that idea. M17 and M18 live on their own pages. Handguns ship to a licensed FFL.

A factory red dot is installed only on the pistols that list one. Restricted-capacity pistols ship with 10-round magazines. See SIG M17 and SIG M18.

How to choose

Compact and XCompact are the shorter 9mm guns. Full-size and XFull stretch the slide. XFIVE and MAX are the 5 in. guns. AXG Legion is the metal grip. Spectre Comp and M.O.D. cut a compensator into the slide. XTEN is 10mm. FLUX is a chassis. Custom Works fire control units are the serialized FCU. The Compact .45 is chambered in .45 ACP and is not optic-ready.

Frequently Asked Questions

What is a SIG P320?

The SIG P320 is SIG’s modular striker-fired pistol. The fire control unit is the serialized part. Grip modules and slides change the size and caliber around that FCU.

What is the difference between P320 Compact and P320 Full-Size?

Compact uses a shorter slide and grip, commonly a 3.9 in. barrel. Full-size uses a longer slide, commonly 4.7 in. Magazines and holsters are not the same.

What is a P320 XTEN?

XTEN is the 10mm Auto P320. A 5 in. bull barrel sits on a 10mm XSeries grip. Magazines are 10mm XTEN magazines. XTEN parts do not interchange with 9mm P320 parts.

Is a P320 fire control unit a complete pistol?

No. A Custom Works FCU is the serialized fire control unit. A grip module, slide, barrel, and magazines still have to go on before it is a complete pistol.

Does a P320 ship to my door?

Handguns and serialized fire-control units ship to a licensed FFL for transfer.