Sig Sauer P320 M18
Military-pattern duty use · Optics-ready carry · Modular caliber changes
| Manufacturer | Sig Sauer |
|---|---|
| Category | Handguns |
| Caliber | 9mm Luger |
| Action | Striker-fired semi-automatic |
| Barrel length | 3.6 in |
| Capacity | 17+1 |
| Weight | 28.1 oz |
| Introduced | 2018 |
About the Sig Sauer P320 M18
The Sig Sauer P320 M18 is the commercial form of the military Modular Handgun System entry, finished in coyote tan with a manual safety and the 3.6-inch barrel of the service pistol. Because the serialized component is the removable chassis, grip modules, slides, and calibers can be exchanged without registering another firearm. It ships with night sights and mounts red dot optics with the correct cut. The striker pull has no bladed trigger safety, a design choice some shooters prefer and others deliberately train around. Magazines interchange across the wider P320 family.
Best ammo for the Sig Sauer P320 M18
Live picks from Top Ammo Supply — in-stock 9mm Luger ammunition, sorted by price per round. Prices and stock refresh throughout the day.
9mm Luger training & range ammo
Full metal jacket and lead loads — the cheapest way to train.
MagtechMAGTECH 9MM AMMO 115GR FMJ STEEL CASE 50RD BOX 50rd$13.49$0.270/rdRemingtonREMINGTON UMC 9MM LUGER AMMO 115GR FMJ BRASS CASED 250RD BOX 1500rd$409.86$0.273/rdCCICCI BLAZER BRASS 9MM LUGER 124GR FMJ 50RD BOX 50rd$14.03$0.281/rdCCICCI BLAZER BRASS 9MM LUGER 115GR FMJ 250RDS 250rd$70.19$0.281/rd9mm Luger defensive loads
Hollow points tested for duty and self-defense use.
WinchesterWINCHESTER DEFENSE 9MM LUGER AMMO 115GR JHP BRASS CASED 50RD BOX 1000rd$423.58$0.424/rdWinchesterWINCHESTER DEFENSE 9MM LUGER AMMO 147GR JHP(HOLLOW POINT) BRASS CASED 50RD BOX 1000rd$423.58$0.424/rdCCICCI Blazer 9mm Luger AMMO 115gr Jacketed Hollow Point (JHP) BRASS CASED 50RD BOX 1000rd$427.12$0.427/rdCCICCI Blazer 9mm Luger AMMO 115gr Jacketed Hollow Point (JHP) BRASS CASED 50RD BOX 250rd$113.39$0.454/rdFull selection: Browse all 9mm Luger ammunition at Top Ammo Supply →
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Related firearms
Specifications are approximate and can vary by variant and production year. Verify with the manufacturer before purchase. Ammunition purchase and shipping restrictions vary by jurisdiction — Top Ammo Supply enforces shipping rules at checkout.