Description

The Smith & Wesson M&P 5.7 is a full-size, polymer-framed semi-automatic pistol chambered in 5.7×28 mm, a high-velocity centerfire cartridge originally developed for personal defense weapons and compact carbines. Smith & Wesson’s M&P 5.7 adapts this cartridge into a pistol format using a gas-operated locked-breech system called the TEMPO™ Barrel System, designed to harness the ballistics of the 5.7 round for smooth cycling and controlled recoil.

This particular configuration includes a 5.0-inch threaded barrel with a 1/2×28 tpi thread pattern and protective cap, allowing for the attachment of muzzle devices or suppressors designed for that common threading. The barrel extends slightly beyond the slide when assembled.

The slide is optic-ready (often in a Shield/RMSc footprint) and the frame includes a Picatinny-style accessory rail. Ergonomics focus on a slim, textured grip profile and controllable recoil envelope, while controls are modern and ambidextrous in many variants.

Feature	Specification
Caliber	5.7×28 mm
Action / Operation	Internal hammer-fired, gas-operated, locked-breech TEMPO™ system
Capacity	22+1 rounds
Barrel Length	5.0 in (127 mm) with threaded muzzle, 1/2×28 tpi
Barrel Twist	1:9″
Overall Length	~8.50 in (216 mm)
Overall Height	~5.25 in (133 mm)
Width	~1.10 in (28 mm)
Weight (Unloaded)	~26.7 oz (756 g)
Frame Material	Polymer
Slide Material	Stainless steel, Armornite® finish (corrosion resistant)
Sights	Steel 3-dot sights; rear may be drift-adjustable
Trigger	Flat-face trigger, crisp single-action break
Controls	Ambidextrous slide stop
Accessory Rail	Picatinny-style under dust cover
Optics Ready	Yes — slide cut for micro red dots

Feautures:

Gas-Operated TEMPO™ Barrel System

Unlike many pistols that use tilt-barrel or straight blowback actions, this 5.7 pistol employs a gas-operated locked-breech system where gas from the fired cartridge delays barrel unlocking until safe pressures are reached. This can contribute to smoother cycling and controlled recoil for the high-velocity 5.7×28 mm cartridge.

Threaded Barrel

• The threaded 1/2×28 barrel allows attachment of devices like suppressors or compensators designed for that thread pattern.

• A thread protector cap is included for use when no device is installed.

High Capacity

• Standard 22-round magazines deliver significantly more capacity than many traditional pistols in similar sizes.

Optics & Accessory Ready

• Factory optic-ready slide means no additional milling is needed to mount many popular micro red dot sights.

• Integrated accessory rail supports lights or lasers.

Ergonomics & Controls

• Slim grip with texture offers positive purchase for a variety of hand sizes.

• Ambidextrous controls and a reversible magazine release accommodate different users.

Trigger

• The flat-face trigger and single-action-like break are engineered for consistent finger placement and predictable performance.