I like either the Deely Lever or the Anson Button. The Push Button design on some Lefevers was very good in my opinion. Most of My Lefevers have the snap on. They are secure, even with ejectors but do have a rather stiff pull-off. The catch on Lefever snap ons is in front of the barrel lug.
I absolutely ABHOR a snap on in which the lug is engaged from the rear. This pushes the forend iron back against the knuckle of the gun & is actually pushing the barrels away from the breech. Just seems the wrong way to go to me & adds un-necessary friction to the hinge in opening & closing the gun. Best I recall the only gun I currently have with this type is a 16ga Baker Black Beauty.
