The front serrations were intended to be used for press checking your gun. If you keep the gun HOT at all times this procedure is not necessary. There are two concerns that come to mind right of the bat.

1. You are putting your hand/wrist in front of the muzzle.
2. You may not get the slide back into battery. Which means that if you need to shoot,the gun WILL NOT fire.

IMO this is a gimmick to help sell the gun. The serrations may lighten the gun so VERY little that it is negligible.

Another sales gimmick is the trigger reset pitch. You DO NOT want to train using this method. Under the stress of a gun fight you could loose valuable time and possibly short stroke the trigger.

Hope this answers your question.

Be SAFE and shoot often!