The Smith & Wesson M&P9 Shield Plus Carry Comp is a striker-fired 9mm built around the Power Port barrel, which vents gas upward during firing to reduce muzzle rise and let you get back on target faster. The 4-inch barrel and 21.8 oz weight sit in a slim, concealable package. 
 

Key Specifications 

• Model: M&P9 Shield Plus Carry Comp 
• Caliber: 9mm Luger (9x19 Para) 
• Barrel Length: 4 inches 
• Weight: 21.8 oz (1.12 lbs) 
• Capacity: 15 rounds (includes one 10-rd, one 13-rd, and one 15-rd magazine) 
• Action Type: Striker Fired 
• Overall Length: 7 inches 
• Grip Material: Polymer with textured finish 
• Finish Color: Black with Gray Armornite barrel finish 
• Sights: Front Night Sight / Rear Black 
• Optics Ready Cut: Yes 
   

Detailed Features 

The Power Port barrel vents gas upward to reduce felt recoil and let follow-up shots come faster. The ClearSight cut directs gas away from the optic so the sight picture stays clear. The flat-face trigger gives a consistent pull across the full surface width. Armornite finish on the stainless-steel slide resists corrosion. The pistol ships optics-ready with an 18-degree grip angle and aggressive texturing for control. 
 

Usage Scenarios 

The slim profile and 21.8 oz weight suit daily concealed carry under most clothing. The optics-ready cut and three included magazines make it a workable choice at the range as well. Its compact size and good capacity make it a reasonable home defense option.

The M&P9 Shield Plus Comp gets generally positive marks among owners and online discussions. Most users appreciate the compact dimensions and the higher-capacity magazines compared to the original Shield, calling the upgrade meaningful for everyday carry.

The Power Port feature draws mixed reactions. Many shooters report noticeably less muzzle flip and faster split times during drills, while others, particularly less experienced shooters, say the reduction isn't dramatic enough to be decisive. A few users note feeding issues with certain ammunition brands, though these reports are in the minority.

Sights are a recurring discussion point. Those who mount a red dot are satisfied with the optic-ready cut, but some shooters feel the factory iron sights could be better quality for the price. The trigger gets consistent praise for its feel and consistent reset.

Pricing relative to competing compact 9mms comes up occasionally, with some buyers feeling other options offer similar capability for less money. Most owners ultimately consider it a solid carry gun.