Smith & Wesson M&P9 Shield Plus
- Category
- Pistol
- Barrel
- 79 mm
- Weight, empty
- 507 g
- Introduced
- 2021
About
What it is, and why it matters
The Smith & Wesson M&P9 Shield Plus is a subcompact semi-automatic pistol chambered in 9x19mm Parabellum, introduced by Smith & Wesson in 2021. The pistol features a polymer frame and a stainless steel slide, providing a durable platform designed for years of reliable service in both duty and civilian applications. With a magazine capacity of 13 rounds, this pistol offers ample firepower for defensive applications. The striker-fired action delivers a consistent trigger pull for every shot, reducing training complexity and providing reliable ignition. The 3.1-inch barrel keeps the package compact for concealed carry while still providing adequate velocity from the 9x19mm Parabellum cartridge for effective terminal performance at defensive distances. At 507g (17.9 oz) unloaded, this lightweight pistol is well-suited for daily concealed carry without causing fatigue over extended periods of wear. Smith & Wesson's semi-automatic pistol designs draw on over 170 years of firearms manufacturing expertise, combining proven engineering principles with modern materials and manufacturing techniques to deliver reliable, accurate handguns trusted by military, law enforcement, and civilian shooters worldwide.
The original M&P Shield was so successful that it became Smith & Wesson's best-selling handgun and redefined the single-stack concealed carry category. The Shield Plus raised the bar by fitting 13 rounds into essentially the same slim frame through a patented thin-wall magazine design, directly answering the SIG P365's capacity challenge.
The Shield Plus ships with both a 10-round flush magazine and a 13-round extended magazine. The Performance Center variants offer a tuned trigger, ported barrel and slide, fiber optic sights, and optics-ready slides with various red dot sight options. A 4-inch barrel variant is available for improved accuracy and velocity. The M&P Shield Plus Law Enforcement Only model offers specific features for duty backup use. Smith & Wesson's Armornite finish is a proprietary ferritic nitrocarburizing treatment similar to Melonite/Tenifer. The Shield platform has sold millions of units since the original Shield launched in 2012.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Smith & Wesson
- Category
- Pistol
- Country
- United States
- Status
- In production
- Produced
- 2021
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 79 mm
- Overall length
- 155 mm
- Height
- 117 mm
- Width
- 28 mm
- Weight, empty
- 507 g
- Weight, loaded
- 680 g
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Short recoil
- Firing mechanism
- Striker fired
- Trigger
- Single stage
- Trigger pull
- 27.0 N
- Capacity
- 13
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Polymer
- Slide
- Stainless steel
- Barrel
- Stainless steel
- Finish
- Armornite
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 345 m/s
- Muzzle energy
- 443 J
- Effective range
- 25 m
- Maximum range
- 1500 m
Trajectory
What the round does downrange
Solved from the muzzle figures and the bullet. The dashed rule is the effective range on the record, and the crosses are the steps the solver returned.
Features
What it has
What the record lists as fitted, drawn from the catalogue.
Flat face trigger- Tactile audible reset
18 degree grip angle
Enhanced grip texture
Takedown lever
Front and rear slide serrations
Optics ready slide
Standing
How it compares
Each figure against the firearms of the same type and cartridge that record it, or of the same type where that cartridge has too few. Positions are read to the nearest tenth.
| Measurement | This firearm | Median | Position |
|---|---|---|---|
| Empty weightAmong 560 9x19mm Parabellum pistols | 507 g | 765 g | Lighter than about 90% |
| Overall lengthAmong 559 9x19mm Parabellum pistols | 155 mm | 191 mm | Shorter than about 90% |
| Barrel lengthAmong 569 9x19mm Parabellum pistols | 79 mm | 105 mm | Shorter than about 90% |
| Magazine capacityAmong 571 9x19mm Parabellum pistols | 13 | 15 | Holds fewer rounds than about 70% |
Answers
Questions about the Smith & Wesson M&P9 Shield Plus
How much does the Smith & Wesson M&P9 Shield Plus weigh?
The Smith & Wesson M&P9 Shield Plus weighs 507 g (1.12 lb) empty and 680 g (1.50 lb) loaded.
What caliber is the Smith & Wesson M&P9 Shield Plus?
The Smith & Wesson M&P9 Shield Plus is chambered in 9x19mm Parabellum.
How many rounds does the Smith & Wesson M&P9 Shield Plus hold?
The Smith & Wesson M&P9 Shield Plus holds 13 rounds, fed from a detachable box magazine.
How long is the Smith & Wesson M&P9 Shield Plus?
The Smith & Wesson M&P9 Shield Plus is 155 mm (6.10 in) long overall, with a 79 mm (3.11 in) barrel.
Who makes the Smith & Wesson M&P9 Shield Plus?
The Smith & Wesson M&P9 Shield Plus is made by Smith & Wesson (United States).
When was the Smith & Wesson M&P9 Shield Plus introduced?
The Smith & Wesson M&P9 Shield Plus was introduced in 2021.
How does the Smith & Wesson M&P9 Shield Plus operate?
The Smith & Wesson M&P9 Shield Plus uses a short recoil action, and its firing mechanism is striker fired.
Compatibility
Which parts fit this firearm
Studio
Every part that mounts on this, resolved
Not a list the maker typed out: the answer comes from the mounts this firearm exposes and the interface each part needs, so it stays right when either one changes.
- Every part that mounts on any firearm in the catalogue
- Interface standards, platforms and fit overrides
- The same answers through the API and the MCP server
Requires a signed-in GunSpec account on the Studio plan. The answer is computed per part, so it is not part of the public record.
Provenance
What the record holds
Every figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.
In service
- U.S. Law Enforcement (Off-Duty/Backup)
- United States
- U.S. Civilian Concealed Carry Market
- 2021
Provenance
Confidence in this record
83%
Stockists
Where to buy
Offers link straight to the shop. GunSpec never takes the order.
No shop has listed this firearm yet
Stock and prices come from the shops themselves. If you sell this firearm, you can list it and it appears here.
List a firearmMCP
Ask an assistant about it
The same record, reached the way a person asks for it rather than the way a program does.
Ask GunSpec
Works with
Point an MCP client at GunSpec and it answers from the catalogue rather than from memory. A free key covers the read tools.
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/firearms/smith-wesson-shield-plus' \ --header 'X-API-Key: your_key'{ "id": "smith-wesson-shield-plus", "name": "Smith & Wesson M&P9 Shield Plus", "manufacturer": { "id": "smith-wesson", "name": "Smith & Wesson", "countryCode": "US", "foundedYear": 1852, "website": "https://www.smith-wesson.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-11 23:44:40", "updatedAt": "2026-02-18 03:40:48", "version": "6e259a578cb1b21d72610d761d652c983ff25806b9e736e2db8d2938596e9202" }, "category": { "id": "pistol", "name": "Pistol", "description": "Handguns designed to be fired with one or two hands" }, "country_of_origin": "US", "year_introduced": 2021, "barrel_length_mm": 79, "weight_empty_g": 507, "action_type": "short_recoil"}