Sig Sauer P320 M18

Name: Sig Sauer P320 M18
Brand: SIG Sauer
SKU: 64823

GunCritic Score

Critic Rating

User Rating

0 Reviews

MSRP:

$686.87

Used Price:

$686.87

Sale Price:

$763.19

Sig Sauer P320 M18 Gun Stats

SIG Sauer P320

Palmetto State Armory

New

From $549.99

See Deal

Want to Sell Your Gun?

Get Instant Offer

Sig Sauer P320 M18 For Sale

SIG Sauer P320

Guns.com

$793.72

See Deal

SIG Sauer P320

Sportsman's Warehouse

$770.82

See Deal

SIG Sauer P320

GrabAGun

$462.99

See Deal

SIG Sauer P320

MidwayUSA

$1,749.99

See Deal

SIG Sauer P320

Optics Planet

$801.35

See Deal

SIG Sauer P320

Cheaper Than Dirt

$747.93

See Deal

SIG Sauer P320

Brownells.com

$499.00

See Deal

SIG Sauer P320

KYGUNCO

$639.58

See Deal

SIG Sauer P320

EuroOptic.com

$747.93

See Deal

SIG Sauer P320

Guns.com

$763.19

See Deal

SIG Sauer P320

Academy Sports + Outdoors

$778.45

See Deal

SIG Sauer P320

Firearms Depot

$725.03

See Deal

Do you want to make sure you're paying a fair price for your gun? Why not find this gun's value over at

Blue Book of Gun Values

Sig Sauer P320 M18 Specs

1 Brand

SIG Sauer

2 Model

SIG Sauer P320

3 Category

Handguns

Technical Data

Barrel Length

3.9 Inches

Length

7.2"

Height

5.5 Inches

Width

1.3 Inches

Weight

26 Ounce

Capacity

21 Round

Sig Sauer P320 M18 Features

The SIG Sauer M18 pistol is the United States Marine Corp’s new standard sidearm and is a variant of the SIG P320. Built with a full-size grip module and “compact’ length slide and barrel, the M18 offers ample performance out of a smaller package than its big brother, the M17. Striker fired with a 3.9 inch barrel, this gun’s slide has an optics cut to accept red dot sights.

Sig Sauer P320 M18 Ballistics

Sig Sauer P320 M18 Capacity

Sig Sauer P320 M18 Capacity

The SIG M18 is chambered in 9x19mmNATO and shares magazine compatibility with the M17, the full-size and carry variants of the SIG P320 chambered in 9mm, and the full-size 9mm SIG P250 pistols. The United States Marine Corps’ adoption of this pistol set the standard magazine capacity at 21 rounds in mags with extended floor plates while flush-fit magazines allow for 10 and 17 round capacities.

Sig Sauer P320 M18 Ergonomics

The M18 uses the SIG P250 and P320 grip modules that can easily be swapped out to allow the user different grip sizes to best fit their hand to the gun. The magazine release is reversible to accommodate left handed users and the safety and slide release are present on both sides of the frame. The slide has deep serrations to aid in manually cycling the action.

Sig Sauer P320 M18 Fit & Finish

The M18 is built with a highly durable polymer grip module that is easily removed and replaced for cleaning, and the slide is factory-cerakoted in flat dark earth. The trigger pull on all P320 variants is incredibly smooth for a striker-fired pistol, and the M18 is no different. The frame includes magazine cuts along the bottom of the grip to aid the user in removing magazines that don’t drop free, and standard disassembly for cleaning is incredibly easy.

Sig Sauer P320 M18 Concealability

While the M18 has the shorter “compact” length barrel and slide, the full-sized grip can prevent easy concealment. The overall height of the gun exceeds 5.5 inches with flush fit magazines which increases the difficulty of concealing this pistol underneath clothing. The tang along the back of the grip can also cause discomfort when appendix-carrying this pistol.