Strike Industries P320MMR Modular Magazine Release Sig P320 Black Stainless Steel SI-P320-MMR UPC 708747548075
Product Description
The Strike Industries Modular Magazine Release for Sig Sauer P320 (SI-P320-MMR) is an ergonomic upgrade engineered to improve reachability and speed during magazine changes on Sig Sauer P320 series handguns. Designed to overcome the near-flush profile of the factory magazine catch, the MMR system allows operators to customize their magazine release button profile without requiring permanent frame modifications or complete lockwork disassembly.
Precision CNC-machined from durable, high-strength stainless steel and finished with a QPQ black coating, the SI-P320-MMR offers maximum resistance against surface friction, sweat corrosion, and high-volume tactical training wear. The modular architecture features a hot-swap capability, allowing users to quickly attach or remove the included extended magazine release button using a single screw—enabling seamless adaptation between low-profile concealed carry and extended competition setups.
Compatible with standard factory Sig Sauer P320 polymer grip modules and aftermarket chassis setups, the Strike Industries SI-P320-MMR delivers smooth drop-free magazine ejection, clean engagement, and enhanced tactile feedback for shooters operating with bare or gloved hands.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Direct drop-in fitment for Sig Sauer P320 (including M17 and M18) factory grip modules. (Note: Thread locker such as Blue Loctite 242 is strongly recommended for the extension retention screw to prevent loosening under heavy recoil firing schedules).
- Perform a complete firearm safety check: drop the magazine, lock the slide rearward, and visually inspect the chamber to verify zero live rounds are present.
- Separate the slide assembly and Fire Control Unit (FCU) from the polymer grip module according to Sig Sauer field strip procedure.
- Depress the factory magazine catch stop using a small punch or armorer tool and slide out the factory magazine release assembly.
- Insert the Strike Industries SI-P320-MMR stainless steel body into the grip module release channel until it seats flush.
- Select your preferred button attachment (standard or extended) and apply a small drop of medium-strength threadlocker to the provided mounting screw before torquing into the release body.
- Reinstall the FCU and slide assembly, insert an empty magazine, and perform a manual drop-free function check before live fire.
Key Features
- Modular Hot-Swap Extension System: Swap between standard and extended magazine button sizes without taking apart the entire release assembly.
- Durable Stainless Steel Construction: Precision-machined stainless steel core guarantees non-flexing rigidity and long-term durability.
- QPQ Black Surface Coating: Delivers superior corrosion resistance against perspiration, solvents, and environmental moisture.
- Improved Reachability & Ergonomics: Extended button surface provides fast thumb contact for shooters with smaller hands or when wearing heavy tactical gloves.
- Lightweight Drop-In Upgrade: Engineered for quick, non-destructive installation into factory Sig Sauer P320 grip modules.
- Complete Conversion Kit: Comes complete with the magazine release main body, extended button, and mounting screw.
Product Specifications
- Brand: Strike Industries
- Model/Series: Modular Magazine Release (Sig Sauer P320)
- MPN / SKU: SI-P320-MMR
- UPC: 708747548075
- Platform Fitment: Sig Sauer P320 / M17 / M18
- Material: QPQ-Coated Stainless Steel
- Finish / Color: Matte Black
- Assembly Weight: 0.7 oz
- Included Components: 1x Mag Release Body, 1x Extended Button, 1x Mounting Screw
- Country of Origin: USA / Taiwan
