• For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • For the best inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols shop Four Brothers Holsters. Full sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material, smooth edges to reduce printing, accommodates most red dot sights. Proudly made in the USA.
  • Inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols. Full Sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material and smooth edges to reduce printing. Profiled to accommodate a red dot sight mounted to the pistol Proudly made in the USA.
  • Inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols. Full Sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material and smooth edges to reduce printing. Profiled to accommodate a red dot sight mounted to the pistol Proudly made in the USA.
  • Inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols. Full Sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material and smooth edges to reduce printing. Profiled to accommodate a red dot sight mounted to the pistol Proudly made in the USA.
  • Inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols. Full Sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material and smooth edges to reduce printing. Profiled to accommodate a red dot sight mounted to the pistol Proudly made in the USA.
  • Inside Waistband Kydex holster designed to fit the Sig Sauer P320 Full size and M17 pistols. Full Sweatguard, adjustable retention, adjustable ride height, and cant. Minimal material and smooth edges to reduce printing. Profiled to accommodate a red dot sight mounted to the pistol Proudly made in the USA.
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MADE IN THE USA

Sig Sauer P320/M17 IWB Holster

Sig Sauer P320/M17 IWB Holster

$65.00 USD
$65.00 USD
Sale Sold out
Shipping calculated at checkout.
Our Inside Waistband holster for the Sig Sauer P320 Full size and M17 is vacuum formed with a precision machined mold designed from a CAD model of the actual firearm. 
Does not fit the P320 Spectre Comp

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.

The retention of the holster is easily adjusted so that the fit can be dialed in to your personal preference. 

Features:

  • Full Sweatguard
  • Adjustable retention
  • Adjustable ride height and cant. 
  • Made from .080" thick thermoplastic for durability
  • Minimal material and smooth edges to reduce printing.
  • Holster is designed to accommodate a red dot sight mounted to the pistol
  • Optional Modwing includes 2 inserts to allow user to adjust the amount of leverage placed against the inside of the belt to reduce firearm printing
  • Proudly made in the USA.

This holster may NOT clear all red dot sights on the market. 

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:

Double Stack 9/40 IWB Magazine Pouch

Double Stack 9/40 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.  

    View full details

    Customer Reviews

    Based on 4 reviews
    75%
    (3)
    25%
    (1)
    0%
    (0)
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    I
    Ian
    Specter Comp

    Very well made holster. My only feedback would be to refine the gas pedal slot by try to round / gently slope the edges of the tunnel. Currently it’s a long narrow rectangle and this high point is the primary pressure point against the body. It focuses the belt force on a small pressure point.

    S
    Steven S.
    M17 IWB Holster

    100% satisfied with the way it fits the gun, the way it fits on the belt, and the quality and craftmanship. Gave it a test, attached it with the M17 to my cargo shorts with T-shirt and went out shopping. Didn't print and it wasn't uncomfortable. Would buy another holster from this company.

    T
    Terry D.
    IWB

    Great holster, no issues with the order procces, shipped down to Australia with no problems. Holster fit the gun with great retention, very comfortable to wear, wouldn't hesitate to order from these guys again.

    C
    Chris D.
    Great product

    Great quality and service