Brouwer M1811 SIG P320 Grip Module


The Brouwer M1811 Grip module for the SIG Sauer® P320 has a conservative texture. The module is made from polymer and is appropriate for low-cling applications, including concealed carry. Compatible with 9mm, .357 SIG and .40 caliber fire control units.

A flared magwell extension is available for this grip module.

Does not include a magazine release.

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The Brouwer P320 Grip Module improves point-of-aim repeatability by utilizing ergonomics nearly identical to the 1911 grip angle. The front strap angle has been changed to 107.5 degrees. The back strap angle is 67.5 degrees. With these dimensions, the pistol sits in the hand when gripped, similar to 1911 platform pistols. The geometry aids the shooter by placing the bore axis in a natural position.

The beaver tail has been moved up to reduce the height over the bore while maintaining the full functionality of the P320’s fire control group. The beaver tail has been profiled to draw the hand into the gun while providing a large surface to reduce the effort to mitigate recoil.

The rear profile of the beaver tail has been shaped to minimize catching the web of the user’s hand when gripping the gun, promoting quick grip acquisition.

An oversized trigger guard was kept to ensure use with gloves in cold weather and reprofiled to remove unnecessary features. The profile of the trigger guard was moved up to improve the grip index relative to the beavertail while maintaining clearance for the trigger. The mag release button tolerances have been reduced to combat dust ingress.

Simulated side scales similar to the 1911 are present to stiffen the grip and fill the natural void in the palm without increasing the front and back strap radii. The front and back strap have been checkered with 25 lines per inch to improve grip without damaging clothing.

Includes a MIL-STD-1913 Picatinny rail.


Available in Black or Coyote.

Brouwer P320 Grip Module Product Notes & Fit Guide

  • This full-size module fits P320 9mm 17 and 21-round magazine lengths. Compact (15-round) magazines will be too short.
  • The modules are specifically designed for 9mm, .357 SIG and .40 caliber fire control units. Modules are not intended for .45 ACP or 10mm pistols.
  • Modules do not feature cuts for manual safety.
  • Due to unending options, we cannot provide information concerning holster or rail-mounted light compatibility.
  • Modules are designed to fit the newer style SIG Sauer magazines with the square peg. You must modify the base pads if you have the original magazines with the round peg at the base pad. Newer pads and plates are available.

Additional information

Weight .3125 lbs
Dimensions 10 × 6 × 2 in

Black, Coyote

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Many parts sold by Grayguns - including but not limited to triggers, trigger kits, internal components and spring kits - are intended for installation by a qualified armorer or gunsmith who is familiar with the firearm.

Although kits fit with no issues in a great majority of pistols, Grayguns cannot guarantee perfect functionality in every instance.

Due to varying tolerances present in all mass-produced firearms, professional fitting by a qualified armorer who is familiar with the pistol's action may be required.

Grayguns offers installation services for all parts kits we offer. If you have any issues or questions about the installation process, STOP IMMEDIATELY and contact the Grayguns Customer Service Team.