Fills its intended purpose very well - ATI Outdoors Shotgun Mag Clamp

This also makes an excellent mount for putting a light on the barrel of an AR-15, without the need for a rail. Using a forward hand position, and the light at 1 o'clock (to the right of the front site post), the light's tailcap switch is easy to activate with the thumb of the support hand-- no expensive pressure switch, no cord to get tangled, and low profile. If you're shooting a freefloated rifle in a Palma match, the weight of the light may degrade your accuracy by changing barrel harmonics. Otherwise, this is a great, simple option.
Pros: Lightweight, easy to install
Cons: Plastic-based, potential for breakage, but seems very durable

This review was written in the old system and had content requirements that are different than reviews written today.