If you think that all shotgun magazine extension tubes are the same with just a small differences then this review will surprise you! ;)
Sage International Shotgun Barrel/Magazine Clamp (Battleclamp) has a very nice smooth design with rounded edges. It stabilizes the magazine extension by clamping it to the barrel. That way, you will not damage the extension if you hit something with it. The Sage International clamp fits Remington 870, 1100, 11-87 and Benelli M1, M2, M4, M1014, 12 gauge shotguns.
The Mesa Tactical Magazine/Barrel Clamp for tactical shotguns is a two-piece clamp made of 6061-T6 aluminum which is lightweight and sturdy. The Mil-spec Type 3 hardcoat is anodized to withstand hard use.
So, what is the purpose of the barrel/magazine clamp? It holds the magazine extension more securely to protect it from damage in case of bumps. Hits are very common when you actually use your shotgun for hunting, training or home defense. Just remember that if you hit something with your magazine extension and it brakes, then the spring, follower and all the ammo will just fall out of the magazine tube. If the magazine tube nut stays in place, then you will be able to put your shotgun loading rounds into a chamber. But if the magazine extension and magazine tube are broken, the barrel will not stay in place while making the shotgun useless.
Thanks to Synchronizor for this fantastic review!
One of the attributes that makes the venerable Remington 870 so flexible is the fact that its magazine can easily be expanded without having to change out the barrel or the base magazine tube. It’s not surprising then, that magazine extension options abound for the 870, and an extension is often one of the first things to be considered when planning a build.
More nice photos from JBall on Remington 870 Forum:
Here are a few shots off my stock Remington +2 extension with Magpul barrel clamp/sling mount…
A tubular magazine usually runs under the barrel allowing rounds to be loaded tip to primer. This works well for shotgun shells, because there is not a pointed protrusion that can trigger the primer on a shell. The magazine load is limited by design particularly on shotguns because of waterfowl laws and other local, state and federal laws. Usually you can load four in the tube and have one chambered for a total of five. However, some believe that leaving five rounds loaded for extended periods may wear out the magazine’s spring, so some only leave three in the tube to reduce stress. This is only conjecture however, but it does appear that springs can wear out from use and not just because they are compressed for long periods.
Various semi-automatic shotguns can have a detachable magazine. This typically means the rounds are loaded into a box type magazine or clip and is then inserted into the shotgun just as if you would a rifle or even a handgun. The magazine is loaded then inserted versus loading the under the barrel tube magazine.
rythomas0704 has posted review of the Choate magazine extension for Remington 870 shotgun on Remington 870 Forum.
Benelli Supernova is one of the best shotguns for competition shooting. I will have separate post about advantages it gives to a competition shooter. This post is about Benelli Supernova upgrades and accessories.
I decided to get the longest 28″ barrel because my +7 extension is still longer than the barrel. Longer barrel enables you to hit the targets on longer distances.
Here’s story from a very talented person, 737mechanic has made his own Mossberg 590A1 Mag Extension for 18.5 Barrel. The final result is really impressive.