STRIKE INDUSTRIES Aluminum Ext Magazine Plate SIG P320 (9mm) FDE | Shop Now

Item #—–291808
Style—–STR-SI-EMP-AL-P320-FDE
UPC—–793811766585
Condition—–New
Manufacturer—–Strike Industries
Weight—–1 lb

Strike Industries Aluminum Extended Magazine Plate for SIG SAUER P320 (9mm) — FDE

Purpose-built for SIG SAUER P320 double-stack magazines, this aluminum EMP adds +5 rounds of 9mm capacity while keeping a slim, low-drag profile for fast, snag-free reloads. Precision machined from 6061-T6 and finished in anodized FDELINE, it fits 21-, 17-, and 15-round OEM mags (with spring usage as noted) and remains within USPSA length limits for popular divisions.

Key Features

• Fits 21, 17, and 15-round SIG SAUER P320 magazines
• +5 round capacity (9mm)
• 6061-T6 aluminum construction; anodized FDELINE finish
• Slim, low drag / no snag exterior for clean reloads
• Adaptable, secure design; simple, intuitive installation
• USPSA legal (see rules below)
• Compatible with SI EMP Pocket Clip

Package Contents

• 1× Aluminum Extended Magazine Plate for SIG SAUER P320 (9mm)
• 1× Extended-length spring (for 21-round mag body)
• 2× Set screw (M4×3 mm)
• 1× Hex tool (2 mm)
• 1× Warning card

Compatibility

• OEM SIG SAUER P320 magazines:
  • 21-round with included SI spring
  • 17-round with OEM spring
  • 15-round with OEM spring
• Most SIG SAUER P320 grip modules
• SI EMP Pocket Clip

Not Compatible

• 10-round magazines
• Some magwells (fit not guaranteed)
• Aftermarket magazines (e.g., ACT, ProMag, ETS)

USPSA Magazine Rules

• 17-rd P320 mag overall length with EMP: 141 mm — qualifies for Carry Optics & Limited
• 21-rd P320 mag overall length with EMP: 162.5 mm — qualifies for Open

Specifications

• Weight: 1.97 oz
• Material: 6061-T6 aluminum
• Finish: Anodized FDE (FDELINE)

Notes

• Torque: do not exceed 7 in-lbs (0.79 N·m) on set screws.
• The included extra-power spring is intended for the OEM 21-rd mag. Due to normal variance in stamped steel mags, some may initially achieve +4 until the spring breaks in.