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Description
Product Overview
Boost your firepower and upgrade magazine handling with the ZR Tactical Solutions +4 Magazine Extension for Smith & Wesson M&P Full Size. Precision-machined from solid billet aluminum and finished with a durable anodization, this base pad extension increases your magazine capacity by 4 rounds while retaining the reliability of your factory magazine spring.
Engineered for hard competition and tactical use, the extension secures firmly using dual ZRTS Bolt Catch Pins, eliminating set-screw failure points or fragile locking plates. Fully compatible with standard full-size M&P 9mm magazines as well as 17-round M&P Competitor magazines, it adds critical capacity and extra gripping real estate for rapid magazine strips and reloads.
High-Capacity Magazine Extension Restriction Notice: Please check your local and state laws prior to purchasing. Residents in restricted states are responsible for order cancellation and/or restocking fees if an order is placed for a restricted item that ends up being cancelled. The buyer assumes full responsibility for attempting to purchase items that are restricted by law in their jurisdiction.
Key Features
- +4 Round Capacity Increase: Instantly converts standard 17-round full-size M&P magazines to 21 rounds.
- 6061 Billet Aluminum Construction: Machined from solid aluminum with a hard anodized finish for maximum drop protection and longevity.
- Dual Bolt Catch Pin Retention: Uses two ZRTS Bolt Catch Pins for a rock-solid lockup that will not slip under hard impact.
- Reuses Factory Mag Spring: Engineered to work reliably with your original factory magazine spring.
- Enhanced Reload Ergonomics: Adds positive gripping surface to speed up tactile indexing and magazine extractions.
Specifications
| Brand / Manufacturer | ZR Tactical Solutions |
|---|---|
| SKU | SAW-EXT |
| Firearm Compatibility | Smith & Wesson M&P Full Size & M&P Competitor Series |
| Magazine Compatibility | Factory 17-Round M&P Full Size / Competitor 9mm Magazines |
| Capacity Added | +4 Rounds |
| Material / Finish | Billet Aluminum / Anodized |
| Retention System | Dual ZRTS Bolt Catch Pins |
| Spring Requirement | Reuses Factory Magazine Spring |
Frequently Asked Questions
Do I need to purchase an aftermarket magazine spring for this +4 extension?
No. The ZR Tactical Solutions +4 extension is engineered to operate reliably using your factory 17-round OEM magazine spring.
Will this extension fit S&W M&P Compact 15-round magazines?
This extension (SKU: SAW-EXT) is designed specifically for full-size M&P 17-round magazines and M&P Competitor magazines. Fitment on compact body bodies may result in grip clearance issues.
Why might a new extension feel tight when seating into the pistol?
Due to slight manufacturing variances in lower frame grip geometry across different generations of M&P pistols, some fits may feel tight initially and require firm force to seat until broken in.
How does the retention pin system secure the basepad?
The extension uses two ZRTS Bolt Catch Pins that slide vertically into keyways, securing the aluminum body directly onto the magazine metal track for a non-destructive, wobble-free fit.
