UPC 798681561018 from 64 retailers

  • Magazines
  • .40 S&W
  • Sig Sauer
Shipping:

SIG SAUER P320 - This magazine is designed for the Sig Sauer P320 full

Price History
MAGAZINE, P320, 40/357, 18RD MAG, FULL-SIZE
.357 SIG
$40.86/ct $40.86 Gun Wise
Sig Sauer P320 Full-Size .40 S&W/.357 SIG 18-Round Magazine
.357 SIG
Shipping $10
$41.98/ct $41.98 Deerford Defense

UPC 798681561018 Price Graph

  • Today's low of $40.86/mag is more expensive than 51% of daily lows in the last 180 days.
  • Today's average of $48.08/mag is more expensive than 99% of daily averages in the last 180 days.
  • The low peaked at $42.20/mag on April 26, 2026 and bottomed at $37.78/mag on September 27, 2026.

SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Free Shipping > $900 CC Fee 3%
$42.14/ct $42.14 Armed in Michigan ★★★★★ (714)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$42.88/ct $42.88 Patriotic Firearms
P320 Magazine .40s&W/.357 - 18 Round Extended 40/357 Full-Size Magazine, Black
9mm
$42.99/ct $42.99 Brownells ★★★★★ (737)
Sig Sauer P250 / P320 Full-Size .40 S&W / .357 Sig 18-Round Magazine
.357 SIG
$42.99/ct $42.99 GunMag Warehouse ★★★★★ (71)
MAG SIG P250/P320-FS 40/357 18RD BLK
.357 SIG
Shipping $10
$43.20/ct $43.20 AZ Arms Depot ★★★★★ (229)
Sig Sauer P320/P250 18rd Magazine - .40 S&W/.357 Sig
$43.20/ct $43.20 Georgia Guns & Ammo ★★★★★ (2)
Sig Sauer P320 / P250 Full Size .40 S&W / .357 Sig 18 Round Magazine - The Sig Sauer P320/P250 Full-Size Magazine is a factory-original OEM magazine engineered for seamless reliability in full-size frames. Chambered for dual compatibility with .40 S&W and .357 Sig cartridg...
.357 SIG
Shipping $8
$43.34/ct $43.34 Guns.com ★★★★★ (38,455)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
.357 SIG
$43.60/ct $43.60 Pickett's Mill Armory ★★★★★ (26)

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SIG SAUER MAG 320/250 357SIG/40S&W 18RD
.357 SIG
$43.90/ct $43.90 Allied Arms ★★★★★ (310)
Sig Sauer P320/P250 18rd Magazine .40 S&W/.357 SIG Metal
.357 SIG
Free Shipping > $500
$43.98/ct $43.98 Shooting Surplus ★★★★★ (193)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Shipping $20 Free Shipping > $1,000
$44.00/ct $44.00 Life2A ★★★★★ (3)
Sig Sauer MAGMODF4318 P320/P250 18rd 40S&W/357Sig Blued Metal
$44.00/ct $44.00 CLB Guns ★★★★★ (45)
Sig Sauer Handgun Magazine P320 Full-Size .40/357 cal 18/rd
$44.16/ct $44.16 MCM Tactical ★★★★★ (60)
MAG SIG P250/P320-FS 40/357 18RD BLK
.357 SIG
Free Shipping > $500
$44.40/ct $44.40 Timber Hole Outdoors ★★★★★ (6)
Sig Sauer Handgun Magazine P320 Full-Size .40/357 cal 18/rd
.357 SIG
CC Fee 6%
$44.80/ct $44.80 All Things Firearm ★★★★★ (3)
Sig Sauer Handgun Magazine P320 Full-Size .40/357 cal 18/rd
Shipping $20
$45.20/ct $45.20 JB Armament ★★★★★ (126)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
.357 SIG
Shipping $13 Free Shipping > $500
$45.47/ct $45.47 Axolotl Arms ★★★★★ (126)
MAG SIG P250/P320-FS 40/357 18RD BLK
Shipping $20 Free Shipping > $1,000
$45.91/ct $45.91 Dave's Guns ★★★★★ (28)
MAG SIG P250/P320-FS 40/357 18RD BLK
Shipping $11
$45.99/ct $45.99 Underground Tactical
MAG SIG P250/P320-FS 40/357 18RD BLK
Shipping $14 Free Shipping > $500 CC Fee 3%
$46.00/ct $46.00 Minutemen Defense ★★★★★ (54)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Free Shipping > $1,250
$46.00/ct $46.00 Nadir Solutions ★★★★★ (18)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$46.00/ct $46.00 Highland Arms ★★★★★ (49)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
.357 SIG
$46.04/ct $46.04 Redsand Tactical
MAG SIG P250/P320-FS 40/357 18RD BLK
Shipping $20
$46.40/ct $46.40 Down Range Firearms ★★★★★ (8)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Shipping $20
$46.80/ct $46.80 Custom Creatives Group ★★★★★ (24)
Sig Sauer P320, P250 .40 S&W, .357 SIG 18 Round Extended Magazine
.357 SIG
Shipping $6
$46.99/ct $46.99 The Mag Shack
Sig Sauer P320 18rd .40/.357 Full-Size Magazine Black
Shipping $10
$46.99/ct $46.99 Alexander's Store ★★★★★ (1,532)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Shipping $15 Free Shipping > $149
$46.99/ct $46.99 Extreme Products ★★★★★ (83)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$46.99/ct $46.99 Big Bee Bee ★★★★★ (11)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
CC Fee 3%
$46.99/ct $46.99 Cornerstone Arms ★★★★★ (373)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$47.07/ct $47.07 The Arsenal Project ★★★★★ (16)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$47.20/ct $47.20 Don's Weaponry ★★★★★ (252)
Sig Sauer Mag P320 40/357 Full MAGMODF4318 18rd
Shipping $15 Free Shipping > $500
$47.99/ct $47.99 BuyAGun ★★★★★ (3)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$47.99/ct $47.99 Precision Gunworks
Sig Sauer MAGMODF4318 P320/P250 18rd 40S&W/357Sig Blued Metal
.357 SIG
Shipping $15 Free Shipping > $500
$48.00/ct $48.00 Garrison's Guns ★★★★★ (21)
Sig Sauer MAGMODF4318 P320/P250 18rd 40 S&W/357 Sig Blued Metal
Shipping $18
$48.00/ct $48.00 Sharp's Shooting Supply ★★★★★ (34)
MAG SIG P250/P320-FS 40/357 18RD BLK
.357 SIG
Shipping $19 Free Shipping > $750
$48.00/ct $48.00 Riddle Firearms
Sig Sauer MAGMODF4318 P320/P250 18rd 40S&W/357Sig Blued Metal
.357 SIG
$48.00/ct $48.00 Birmingham Hill Armory ★★★★★ (16)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Shipping $15 Free Shipping > $500
$48.42/ct $48.42 Hollow Point Arms ★★★★★ (8)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$48.99/ct $48.99 2 If By Sea Tactical ★★★★★ (135)
MAG SIG P250/P320-FS 40/357 18RD BLK
.357 SIG
$49.91/ct $49.91 Utah Fast ★★★★★ (101)
Sig Sauer MAGMODF4318 P320/P250 18rd 40S&W/357Sig Blued Metal
Shipping $11
$49.99/ct $49.99 Selway Armory ★★★★★ (186)
Sig Sauer P320 40/357 Full Size 18 Round Magazine
9mm
$49.99/ct $49.99 Scheels ★★★★★ (4,982)
MAG SIG P250/P320-FS 40/357 18RD BLK
.357 SIG
$49.99/ct $49.99 Get Guns N Ammo
Sig Sauer P250/P320 Full Size .40 S&W/.357 SIG 18 Round Magazine
.357 SIG
Shipping $16
$50.00/ct $50.00 Caliber Depot ★★★★★ (6)
MAG SIG P250/P320-FS 40/357 18RD BLK
Shipping $10 Free Shipping > $100
$50.17/ct $50.17 Conkey's Outdoors ★★★★★ (175)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Shipping $25 $25 Off Orders $200+ Code LOCKNLOAD25
$50.96/ct $50.96 Scottsodg.com
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Free Shipping > $250 $15 Off Orders $75+ Code CALIBERKING
$50.99/ct $50.99 Brickhouse Firearms
MAG SIG P250/P320-FS 40/357 18RD BLK
.357 SIG
$50.99/ct $50.99 Pathfinder Militaria ★★★★★ (106)
Sig Sauer P320 / P250 Full Size Magazine, .40 S&W/.357 SIG, 18 Rounds, Extended, Black – MAG-MOD-F-43-18
$50.99/ct $50.99 Black Bayou Armory ★★★★★ (83)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
.357 SIG
$51.10/ct $51.10 Tungsten Creek Tactical
MAG SIG P250/P320-FS 40/357 18RD BLK
$51.99/ct $51.99 WTW Arms ★★★★★ (68)
Sig Sauer MAG 320/250 357SIG/40S&w 18RD
$52.24/ct $52.24 Shiner Tactical ★★★★★ (6)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Shipping $15 Free Shipping > $500
$54.00/ct $54.00 Kinetic Armory ★★★★★ (3)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
Free Shipping > $700
$54.31/ct $54.31 Freedom Firearms ★★★★★ (2)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$54.88/ct $54.88 Bulletproof Outfitters ★★★★★ (133)
Sig Sauer MAG-MOD-F-43-18 P320/P250 40 S&W/357 Sig 18-Round Magazine, Black
.357 SIG
Free Shipping
$54.99/ct $54.99 Bereli ★★★★★ (1,013)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$56.00/ct $56.00 Firearms Express
SIG SAUER P320 40/357 Full Size 18 Round Pistol Magazine Blued 1 Pack Metal 18RD
9mm
Free Shipping
$57.79/ct $57.79 Optics Planet
Sig Sauer 18 Round .40 S&W/.357 SIG Magazine, Black - MAGMODF4318
.357 SIG
$57.99/ct $57.99 Palmetto State Armory ★★★★★ (1,164)
SIG SAUER MAG 320/250 357SIG/40S&W 18RD
$58.99/ct $58.99 Coastal Firearms
Sig Sauer MAGMODF4318 P320/P250 18rd 40S&W/357Sig Blued Metal
$60.00/ct $60.00 EK Tactical ★★★★★ (10)
Sig Sauer MAG-MOD-F-43-18 P320/P250 40 S&W/357 Sig 18-Round Magazine, Black
.357 SIG
Free Shipping
$241.99/ct $241.99 Bereli ★★★★★ (1,013)
Sig Sauer MAG-MOD-F-43-18 P320/P250 40 S&W/357 Sig 18-Round Magazine, Black
.357 SIG
Free Shipping
$477.99/ct $477.99 Bereli ★★★★★ (1,013)

UPC 798681561018 Price Graph

  • Today's low of $40.86/mag is more expensive than 51% of daily lows in the last 180 days.
  • Today's average of $48.08/mag is more expensive than 99% of daily averages in the last 180 days.
  • The low peaked at $42.20/mag on April 26, 2026 and bottomed at $37.78/mag on September 27, 2026.

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