Plus 4 Base Pad for P226

If you shoot a Sig Sauer P226 in .40 S&W, you already know the factory magazine capacity can leave you wanting more—especially during a long range session or a match where every round counts. The Plus 4 Base Pad gives you four extra rounds without changing the overall feel of your reloads. It replaces your existing magazine floor plate to add capacity while keeping the same reliable spring and follower setup you already trust. Whether you’re topping off for competition or just want fewer magazine changes at the range, this simple swap gets you there.

Will It Fit My Gun?

• Sig Sauer P226 chambered in .40 S&W (standard capacity magazines)
• Fits factory 12-round .40 S&W P226 magazines
• Does not fit 9mm P226 magazines or .40 S&W compact/subcompact models
• Not compatible with aftermarket extended magazines—OEM factory mags only

What You Get

• +4 rounds: Boosts standard .40 S&W magazines from 12 to 16 rounds
• Dimpled base: Small dimples on the bottom surface make it easy to tell your extended mags from standard ones by touch
• Simple install: No special tools, no permanent modification—just swap the base pad and you’re back in business
• Solid feel: Machined from quality material, fits snug without wobble

Install Difficulty: 1 out of 5

You’ll need a small punch or a paperclip to depress the magazine catch inside the base pad. That’s it. Pop off the old floor plate, slide on the new one, and you’re done. Plenty of folks do it in under two minutes. We recommend a workbench or table just so you don’t lose the spring.

Frequently Asked Questions

Will this work with my P226 9mm magazines?

No—this base pad is designed specifically for .40 S&W magazines. The 9mm versions have a different body width and floor plate shape. Stick with the .40 S&W factory mags for this one.

Do I need a new magazine spring?

In most cases, no. The factory spring provides enough tension to handle the extra four rounds reliably. If your spring is old or worn, you may want to replace it as a precaution, but it’s not required.

Is this legal in my state?

This product cannot be shipped to California, Oregon, Rhode Island, or Washington due to state capacity restrictions. If you live elsewhere, check your local laws before ordering—we want you to stay safe and legal.

Shipping & Warranty: We ship this same business day if you order by 2 PM Eastern. Comes with our standard 30-day satisfaction guarantee—if it doesn’t fit or you change your mind, send it back. We’re a small family shop and we stand behind what we sell.