BudsGunShop.com - S&W own website & internal lock

I don't see where the web site shows the picture you are referring to or where it says it does not have the internal lock link to pagesmith-wesson.com/firearms/mp-340-ct-crimson-trace-lasergrips (it also does not say that it does ) other sits say it has the ILS therefore I suggest contacting S&W to be 100% sure By Telephone:
(USA) 1-800-331-0852
Mon-Fri 8:00AM-6:00PM Eastern Time

Robert, Yes this model does come with the Internal Lock / Safety. Specifications and Features: ---- .357 Magnum caliber (also accepts .38 Special) -- Double action only -- 5 rounds capacity -- XS Sights 24/7 Tritium Night front site -- U-notch rear sight -- Shrouded hammer -- Crimson Trace Lasergrip -- Stainless steel cylinder and barrel -- Overall length 6.31" -- Weight 13.3 oz -- Matte black