SMDahms

Never heard of that. However, the post immediately above gives some help. The little lever doesn't really need any force to be lowered, just a wee flick. I would guess that if excessive pressure was used, you could jam the lever.

As above, call S&W customer service. Please let us know how it turns out.

Except for really basic stuff (pull trigger, gun fires) most brands of firearms have differences. Just like Ford & Chevy.