The Sig Sauer P320 M18 index · Nov 2, 2026

SIG SAUER P320 M18 PRICES TODAY

Sig Sauer P320 M18 is at $700 at the median across 8 retailers. The cheapest in stock is Sig Sauer P320 M18 9mm Luger MPN 320CA-9-M18-MS at Midwest Gun Works, for $650.

Market median$700Flat vs average since Oct 9
Cheapest in stock$650Midwest Gun Works · in stock
Range since Oct 9$700 – $700Low Oct 9 · high Oct 9
Buy at Midwest Gun Works · $649.99Compare prices on this gun →
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What Sig Sauer P320 M18 has cost

Median and cheapest in-stock price · since Oct 9

Cheapest in stock Market median
$642$675$707Oct 9Today$650

In-stock listings only · 8 retailers · price as listed

Every Sig Sauer P320 M18 configuration

4 configurations · 3 in stock · best price at any retailer

ConfigurationBest priceRetailers
Sig Sauer P320 M18 9mm Luger MPN 320CA-9-M18-MS$649.992 of 3 in stock
Sig Sauer P320 M18 *CA Compliant 9mm Luger, Coyote PVD$699.996 of 7 in stock
Sig Sauer P320 M18 9mm Luger, Coyote PVD$1,203.461 of 2 in stock
Sig Sauer P320 M18 9mm Luger MPN 320CA-9-M18-MS-2Mlast $599.99out of stock

Shortage watch

TightLess Sig Sauer P320 M18 is in stock than usual.

In stock60%usual 87% since Oct 9
Retailers in stock7of 8 carrying Sig Sauer P320 M18
Listings in stock9of 15

Share of Sig Sauer P320 M18 listings in stock each day · since Oct 9

Who actually wins Sig Sauer P320 M18

Not who is cheapest on one product, but who has had the cheapest Sig Sauer P320 M18, on the most days, since Oct 9.

RetailerDays cheapestMedian priceSig Sauer P320 M18 in stock
KYGUNCO23 / 25$7001 / 4
GrabAGun21 / 25$7001 / 1
GRITR Sports21 / 25$7001 / 1
Guns.com9 / 25$6832 / 3
Brownells9 / 25$7001 / 1
Shooting Surplus7 / 25$9522 / 2
Midwest Gun Works2 / 25$6501 / 2
Primary Arms0 / 25—0 / 1

Ranked on each day's lowest in-stock price, as listed

Sig Sauer P320 M18 price guide

What's a good price for Sig Sauer P320 M18?
$700 or less: that's the cheapest quarter of days since Oct 9. Sig Sauer P320 M18 is there today, at $700.
Where is Sig Sauer P320 M18 cheapest?
KYGUNCO has had the lowest price on 23 of the last 25 days. Right now the cheapest in stock is Sig Sauer P320 M18 9mm Luger MPN 320CA-9-M18-MS at Midwest Gun Works, for $650.
Do retailers charge different prices for the same gun?
Yes, typically by 1% between the cheapest and dearest retailer, across 2 products we see in stock at two or more retailers. It pays to compare before you buy.
Is Sig Sauer P320 M18 in stock?
60% of the 15 Sig Sauer P320 M18 listings we track are in stock today, across 4 products at 8 retailers, against 87% usually since Oct 9.

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