Well, in my opinion...just looks nicer on the gun. The plastic one probably will never break but with SS you know it will never break. One thing I do wish they made after market would be the slide lock. Other CZ guns seem to have the lock release protrude out more so you can just reach your right thumb up and pull the lock down. On The p-07, you have to tilt your gun to the left a little for your thumb to reach.