This Plus 4 Magazine Base Pad adds four (4) rounds to standard capacity .40S&W Sig Sauer P226 magazines. Designed for shooters who need extra capacity without swapping to a full-length extended magazine, this base pad replaces the factory floorplate to increase total magazine length while maintaining reliable feeding. The dimpled bottom surface provides tactile identification, letting you distinguish this base pad from standard floorplates by feel.
Compatibility
- Sig Sauer P226 (.40S&W)
- Standard capacity .40S&W P226 magazines
- Does NOT fit 9mm or .357SIG P226 magazines
- Does NOT fit P226 X-Five, P226 Legion, or P226 with factory extended magazines
Key Features
- Increases magazine capacity by +4 rounds (factory 12-round .40S&W becomes 16-round)
- Dimpled bottom surface for tactile identification
- Direct replacement for factory floorplate – no permanent modification
- Includes replacement spring (if applicable – verify with your kit contents)
- Machined from 6061-T6 aluminum with Type III hard anodized finish
Install Difficulty: 1/5
No special tools required. Remove factory floorplate, slide new base pad onto magazine tube, and secure with included hardware. Expect 2-3 minutes per magazine.
FAQ
Will this fit 9mm P226 magazines?
No. This base pad is specifically designed for .40S&W P226 magazines. 9mm P226 magazines use a different body profile and will not accept this pad.
Does this require a magazine spring upgrade?
Yes – this kit includes a replacement spring calibrated for the increased capacity. Use only the spring provided with this kit. Do not reuse the factory spring.
Can I use this with a P226 Legion?
No. P226 Legion models use a different magazine catch geometry and will not accept this base pad. Verify your magazine type before ordering.
Ships within 1 business day. Limited lifetime warranty against manufacturing defects. Not available for sale in California, Oregon, Rhode Island, or Washington.
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