Support BladeForums! Paid memberships don't see ads! Hi all, My small Knifeart 21 is very smooth on opening and closing. However, sometimes the action seems much stiffer than other times. This is mostly noticeable on closing. Usually the blade free drops, but sometimes when I depress the lock bar it just stays there. I have been unable to detect any differences in how I am holding the knife when this happens. It really isn't a big deal practically, but I am wondering if this is normal. Thanks in advance!