Fit and Finish
M&P pistols have slides and barrels made from stainless steel that are through hardened, a process that produces both external and internal hardening. The barrels also feature cone muzzles for consistent positioning, which enhances accuracy and produces less friction as the slide travels to the rear. A half moon cut at the rear of the chamber hood allows the shooter to verify whether or not there is a cartridge in the chamber.
Both the slide and barrel receive S&W's proprietary Melonite finish, a heat treated process which penetrates into the metal itself, providing enhanced protection from wear, tear, solvents, and salts. The Melonite finish combines with the through hardening process to produce a surface hardness of 68 Hrc.
Novak Lo-Mount sights are standard on the M&P although Trijicon night sights are available as an option. The front of the slide has a tapered profile to ease re-holstering, especially when the task has to be performed one-handed, while deep cut grasping grooves ensure positive slide retraction, even with wet hands or when wearing gloves. The full-length, stainless steel guide rod and captive recoil spring ensure smooth operation and consistent lockup.
Engineering on the M&P is impeccable. The barrel and slide are locked together by the barrel hood bearing on the front of the ejection port. Upon firing, both parts recoil together for a short distance, whereupon the barrel is cammed down, allowing the slide to continue to the rear, extracting and ejecting the spent cartridge case. The recoil spring then pulls the slide forward, stripping the next round out of the magazine and chambering it. As the slide and barrel go into battery, the barrel hood moves up into the ejection port, locking the two units together.