Sig Sauer M18 for sale
Updated · 21 products · 17 in stock · prices refreshed daily
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Sig Sauer M18 CSS 9mm Optic Ready Coyote Pistol w/ Modular Polymer Gri, (1) 17rd & (2) 21rd Mags M18-9-CSS-MS
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Coyote Tan
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P320 M18 9mm Luger 3.9" BBL (3)10RD Striker COY CA Compliant - P320 M18 9mm Luger 3.9" BBL (3)10RD Striker COY CA Compliant
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Coyote Tan
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M18 9mm Luger 3.9" BBL (3)21RD Mag W/ROMEOM17 Coyote
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Coyote Tan
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SIG SAUER M18 CSS 9mm 3.9in 10rd Coyote Striker Pistol (M18-9-CSS-MS-10)
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Coyote Tan
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Sig Sauer M18 MA Compliant 9mm Luger 3.9" Bbl Striker Siglite Rail Manual Safety Modular Polymer Grip Coyote Pistol w/(3) 10rd Mags M18-9-CSS-MS-MA
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Coyote Tan
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Sig Sauer P320-M18 Carry 9mm Pistol, Stainless - 320CA-9-M18-MS-10
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
10
Finish Per Color:
Coyote Tan
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SIG SAUER M18 9mm 3.9in 2x21rd/1x17rd Black Striker Pistol with ROMEOM17 Rail (WM18-9-PRO-BLK-RM17)
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Black
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SIG Sauer P320 M18 Caliber X-Change Kit 9mm Coyote Tan Pistol
Brand:
Sig Sauer
Action:
Semi-Auto
Caliber:
9×19mm Parabellum
Finish Per Color:
Coyote Tan
![SIG SAUER OFF-DUTY M18 9mm, 3.9" Barrel, Romeo, 21 rnd - FDE [MPN:WM189PROMSRM17]](https://gunsnprices.com/image/cache/wp/gj/coym18xgripms8c43.1758737559611__27072.1758739502-500x335.webp "SIG SAUER OFF-DUTY M18 9mm, 3.9\" Barrel, Romeo, 21 rnd - FDE [MPN:WM189PROMSRM17]")
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SIG SAUER OFF-DUTY M18 9mm, 3.9" Barrel, Romeo, 21 rnd - FDE [MPN:WM189PROMSRM17]
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Flat Dark Earth
![SIG SAUER OFF-DUTY M18 9mm, 3.9" Barrel, Romeo Sight, 21 rnd - Black [MPN:WM189PROBLKMSRM17]](https://gunsnprices.com/image/cache/wp/gj/m18xgripblke69f.1758724598214__46290.1758738383-500x335.webp "SIG SAUER OFF-DUTY M18 9mm, 3.9\" Barrel, Romeo Sight, 21 rnd - Black [MPN:WM189PROBLKMSRM17]")
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SIG SAUER OFF-DUTY M18 9mm, 3.9" Barrel, Romeo Sight, 21 rnd - Black [MPN:WM189PROBLKMSRM17]
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Black
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SIG SAUER M18 9mm 3.9in 2x21rd/1x17rd Coyote Striker Pistol with ROMEOM17 Rail (WM18-9-PRO-RM17)
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Coyote Tan
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M18 9Mm 3.9In 17Rd Coy NS SIGP320M18
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Black
(20)
Sig Sauer P320 M18 Carry 9mm 3.9" Pistol, Coyote Tan - 320CA-9-M18-MS
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Coyote Tan
![SIG SAUER OFF-DUTY M18 9mm, 3.9" Barrel, Optic Ready, 21 rnd - Black [MPN:WM189PROBLK]](https://gunsnprices.com/image/cache/wp/gj/wm189problk7755.1758723593837__58149.1758738377-1024x682-500x335.webp "SIG SAUER OFF-DUTY M18 9mm, 3.9\" Barrel, Optic Ready, 21 rnd - Black [MPN:WM189PROBLK]")
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SIG SAUER OFF-DUTY M18 9mm, 3.9" Barrel, Optic Ready, 21 rnd - Black [MPN:WM189PROBLK]
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Black
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Sig Sauer P320 M18 2-Tone Tacops Semi-Auto Pistol
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
4.6"
Caliber:
9×19mm Parabellum
Capacity:
21
Finish Per Color:
Two Tone
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Sig Sauer P320-M18 LE W320CA-9-M18-MS
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
21
(16)
SIG Sauer M18 Commemorative 9mm Pistol, Coyote - M18-COMMEMORATIVE
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Coyote Tan
(0)
Sig Sauer P320-M18 LE W320CA-9-M18-MS-BLK
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
4"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Black
(20)
Sig Sauer P320 M18 Carry 9mm 3.9" Pistol, Coyote Tan - 320CA-9-M18-MS-2M
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Coyote Tan
(0)
Sig Sauer P320 M18 2-Tone Semi-Auto Pistol
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Finish Per Color:
Two Tone
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Sig Sauer 320CA9M18MS1M P320 M18 9mm Luger 3.90" 17+1 Coyote PVD Coyote Polymer Grip
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
3.9"
Caliber:
9×19mm Parabellum
Capacity:
17
Finish Per Color:
Coyote Tan
Marketplace Insights
★ 4.7/5
based on 76 customer reviews across 21 products from 30 retailers
Overwhelmingly praised P320 M18 pistol delivering excellent reliability, accuracy, and ergonomics with minimal quality concerns.
What customers like
Reliability & Performance58%
Zero malfunctions and shoots really well. I'm constantly hitting a 8 inch steel plate at 50 yards.
Accuracy & Handling45%
Able to shoot it more accurately than my glocks, learning curve/point of aim and impact minimized by proper grip angle.
Ambidextrous Safety35%
I like that the safety is on both sides so I can access it with either hand.
Military Heritage28%
Nice replica of the USMC and USAF standard pistol. It will go into my US military collection.
Modularity & Customization16%
High quality and unmatched modularity. It's great owning a piece of history that has past the riggers of the US Marine Corp.
Common concerns
Ammo Sensitivity5%
This is an excellent firearm provided you have the right ammo. It will NOT fire consistently with 115 gr ammo.
Initial Wear Issues5%
Just picked up my M18 today 24FEB2021, and the barrel looks like it has been shot well over 1000rds.
Break-In Period3%
Great gun but their might be a break in period for ejection issues.
Frequently Asked Questions
Sig Sauer M18 for sale
Is the SIG Sauer M18 a good gun?
"Good" depends on your needs. The M18 is the U.S. military's standard compact sidearm, which speaks to its reliability. Civilian reviewers consistently report solid accuracy and durability. It's a 9mm with a manual safety, typically priced around $650.
What are the common issues with the M18?
Early production M18s had isolated issues with the safety lever, striker assembly, and sear. The Air Force identified and corrected these discrepancies in current production models. When inspecting used examples, check internal safety components for wear.
How much is the SIG M18 worth?
SIG M18 pistols typically sell around $545–$573 new and $394–$428 used, with most listings ranging from $400 to $500 depending on model and condition. Eleven variants are available across 28 retailers, with ten currently in stock.
How many bullets are in a M18?
The M18 ships with one 17-round magazine and two 21-round magazines. The standard capacity is 17 rounds of 9mm ammunition, though the included 21-round magazines extend that capacity when needed.
Which is better, the SIG M17 or M18?
Better depends on your needs. The M17 has a full-size frame, longer barrel, and slightly better recoil control. The M18 is a compact version of the same pistol, easier to conceal and carry. Both fire 9mm and share controls. Choose M17 for range or home defense, M18 for carry.
What is the difference between Sig P320 and M18?
The M18 is a compact military variant of the P320 with a 3.9-inch barrel, smaller grip frame, and 17-round capacity. M18s include a manual safety, optics cut, and three magazines as standard. The civilian P320 Carry matches M18 dimensions but lacks these military-specified features by default.
What SIG SAUER gun is best for everyday carry?
Best choice depends on your priorities. The P365 series excels at concealed carry due to its small size and variants like the P365-XL and P365-380 offer options for different needs. The M18 is a full-size military service pistol, making it less practical for everyday carry. Test P365 variants if possible.
