Recoil can be the biggest problem for shotgun shooters, and once a bad experience with recoil has occurred it is sometimes hard to get the shooter to stop flinching. Properly pulling the weapon back into the pocket of the shoulder and maintaining a good cheek weld are keys to controlling recoil. Also, many low-recoil 00 buckshot loads on the market today reduce recoil but deliver enough energy for a good ballistic performance.Modifications
While the basic operating mechanism of a Remington 870 or Mossberg 500 Series is the same, both companies also make guns with many desirable modifications. Many after-market accessories and modifications are available, too. One of the most important modifications concerns the sighting system, because the standard bead sight is least desirable — it lacks the precision needed for combat use. Rifle sights work well and are easy to use. They also provide a finer sight picture for shooting slugs at extended ranges.
The most effective sights for a combat shotgun, though, are ghost rings. These are made by a range of manufacturers and are even offered as an option by some shotgun makers. They are very fast and provide the needed precision for proper shot placement. As with any other firearms gear, though, you get what you pay for, so do not skimp on the price of your sights and make sure they are durable and easy to use. The ones made by MMC work well.
Optical sights, such as red-dot scopes and holographic displays, are also an option. Again, if you go that route, spend the money to get good ones and keep a supply of batteries handy. Most importantly, make sure your optical sights are backed up by iron sights of some kind; should your optics break or your batteries die, you'll need to go back to your back-up system.
Barrel length and overall length of the gun are important. If a gun is too long, it will be hard to deploy, and if it is too short, it may not perform properly. Also, as the interiors of our Crown Vics get smaller and we pack more gear into them, our guns must still be easily accessible. I find an 18-inch barrel is perfect for a general purpose gun. It keeps the pattern tight enough for most situations, allows for a six-round magazine, and I can still get it in and out of the car easily. Some guns are available with 14-inch barrels but these are designed for entry use and are best suited for SWAT applications.
A shorter butt is also desirable. Having a 12-inch length-of-pull allows the weight of the gun to be held closer in to the body and provides better control. Balancing the weight also lets you hold the weapon up for longer periods of time without getting tired, and it makes the weapon easier to operate for smaller-framed officers. A pistol grip, too, makes it easier to hold the weapon one-handed if need be and provides a little better control while shooting. If your department uses an AR-style patrol rifle, the pistol-grip shotgun will be more familiar to your officers.
Slings are important: A long gun without a sling is like a pistol without a holster. You must have the ability to transition from your long gun, to hands-on, to your pistol, and back again. Slings allow you to do this. Keep in mind that if your adversary grabs your sling, you can be in trouble. For that reason, a sling with a quick release is a good idea.
Another useful item to add to your gun is a dedicated light so you don't have to carry one in your support-side hand. The one made by Surefire replaces the forend of the gun and provides a bright white light.
Because of the shotgun's low magazine capacity, ammunition storage is also recommended. I like the side-saddle holder made by Tac-Star; it mounts to the receiver and holds six rounds securely on the gun. Buttstock ammo carriers are available and can be had in rigid form or as strap-on nylon pouches. Of these, Blackhawk makes a good one. The least desirable are the bandolier-style slings with cartridge loops built onto them because the weight of ammo dangling from your gun can disturb your aim. They are, however, better than nothing.
With the proper preparation and training, and with modification when appropriate, the shotgun should and will continue to be a valuable tool for law enforcement for years to come.