Originally Posted by
canid
i would only criticize the merit of it's effectiveness for the purpose of child safety.
as a child, even a young one, i can say it would only have taken me one observation of a parent using the device to have figured out how to remove it.
there are only two highly effective means of keeping firearms safe from minors:
1.) probably the least effective of the two is to use a key lock device which locks the action from being worked completely, or a safe and ensure the device is locked at all times the firearm isn't in your immediate posession and the key is on your person at all times.
2.) to educate your children about what firearms are, how they work, how they are safely handled and if they express continued curiosity or attraction to firearms, to allow them supervised exposure sufficient to temper any desire for unsupervised handling or use.