Strike Industries Aluminum Extended Magazine Plate for SIG SAUER P320 (9mm) — Black
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 SI BLACKLINE, 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 SI BLACKLINE 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 Black (SI BLACKLINE)
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.
