One of mine came with a "trigger lock". This device violates two of the four basic rules of gun safety:
Always assume a gun is loaded. (The label warns one not to place the lock on a loaded gun.)
Never touch the trigger unless you are ready to fire. (Its impossible not to touch the trigger in putting it on or taking it off.)
In addition, the spring loaded pins meant to ensure that "one size fits all" resulted in "one size fits none".
What a piece of liberal garbage it is.