Nope, because they don't, well not in my experience anyway.
They are a fantastic gun, some people say they are a bit heavy, but i don't find that at all, I have the thumbhole carbine version, the loading is super smooth, great adjustable trigger, and as accurate as the person holding it.
Can't find ANY faults with mine. I love it!!
do you know how many shots you get out of the carbine and the standard ?? looked at them both in gun shop today and there lighter than i expected!!