Sig Sauer P320 Carry/M18 IWB Holster



For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans
For the best IWB AIWB Inside Waistband Kydex Thermoplastic Holster designed to fit the  P320 Compact, Carry, M18, and P320 Wilson Combat Carry grip module pistols, shop Four Brothers Holsters. Adjustable retention, high sweat guard & profile cleared for red dot sights. Made in USA by Law Enforcement & Military Veterans

Inside Waistband Holster designed to fit all P320 Carry pistols, including the M18. This holster will also fit the P320 Wilson Combat Carry grip module.

  • Adjustable retention
  • Profile cut to allow most red dot sights mounted on the pistol
  • High Sweat shield standard, Medium and Low Sweat Shield height available on request 
  • Optional Modwing includes 2 inserts to allow the user to adjust the amount of leverage placed against the inside of the belt to reduce firearm printing
  • Made from .080" thick thermoplastic with minimal material and smooth edges
  • Minimal material and smooth edges to reduce printing
  • Proudly made in the USA

Our holsters are vacuum formed with a precision machined mold designed from a CAD model of the actual firearm. Each holster is formed, trimmed, and folded in-house. Final fit and function tests are done with the actual pistol to ensure the holster fits the gun and has the correct amount of retention.

This holster does NOT have clearance for a threaded barrel.

Our Belt Attachment Blog Article explaining the different options can be found here:

4Bros Four Brothers Holsters Inside Waistband Attachments Explained

Magazine Pouches for these models can be found here:

Sig Sauer P320 IWB Magazine Pouch

Sig Sauer P320 OWB Magazine Pouch

*We strongly suggest you apply a removable thread locker to each screw of your holster after you receive it to prevent lost screws while the holster is in use.  

Sig Sauer P320 Carry/M18 IWB Holster

Regular price $60.00
Shipping calculated at checkout.