“Shotgun” is a common response when someone asks about the ideal home-defense firearm. The answer is solid, particularly when a retailer doesn’t know much about the customer or their experience.

A handgun has advantages. It’s compact and nimble, but using it effectively requires practice. Even when those skills are mastered, however, their lifespan is notoriously short without regular range sessions.

Things are a little more forgiving when it comes to shotguns. Their pattern spreads during flight, erasing small failures in technique. They are a suitable choice when an average citizen who has a schedule too tight for frequent firing-line sessions wants to protect their family and home.  

The rate at which shotguns move off the shelves indicates customers and retailers agree. The new generation of short shotguns, however, has given new life to the mistaken belief that aiming is optional.

Across a room 10 yards long, depending on load and choke, pellets from bird shot might widen to only a foot and a half — on a good day. Without aiming, grandma’s urn and ashes are at greater risk than a home invader approaching fast.  

That fact is startling to many customers, and a great way to open a conversation on the potentially lifesaving virtues of adding a weaponlight/laser to their shotgun. It’s an elegant solution, one that’s particularly advantageous with shorter models not designed for cheek welds and shoulder mounts.

Mention a few lights/lasers you have in stock. That doesn’t guarantee a sale, but expressing a willingness to install one for free might seal the deal.

The process is quick and easy, particularly for shotguns with factory-installed Picatinny rails. In that case, things usually bolt straight on. If that’s your situation, simply skip steps four through nine listed here.

Guns that have M-Lok slots, however, can be slightly more complicated when trying to mount a rail-ready light/laser. An adapter to anchor the optic is required. It only takes a few seconds more and effortless at the counter.  

First and always, safety comes first. While keeping the shotgun pointed in a safe direction, engage its safety if it’s not already in that position.

Maintain safe muzzle orientation and ensure no shotshells are in the magazine. Look if the follower is visible and work the charging handle or forend pump to remove any there. Leave the chamber open and make sure no shotshell remains.        

Mounting a rail-ready light/laser on an M-Lok-equipped shotgun requires a proper-length adapter. Be careful on its length. In the case of the Mossberg 990 AfterShock shown in this story, five-slot models are too long. The shown three-slot version was ideal.

After selecting the proper mount, open the package and inspect for imperfections. Blemishes on contact surfaces can compromise and stall installation.

Consult with the customer to determine the preferred light/laser location. The bottom of the shotgun minimizes blind spots when the light is activated, but there are factors that can make left or right locations more suitable. Ensure the selected spot is clean and burr free. Place the bolt-free adapter there to double-check fit, then remove the unit.

Thread the provided adapter bolts and nuts together and hand tighten. Some aftermarket versions get stingy. Now’s the time to discover any hangup, not while handling the shotgun. If needed, work with appropriate tools until they mate smoothly or select another unit from your stock.

Now you’re ready to insert the bolts into the adapter body. Thread the nuts with the same orientation as seen in step eight’s photo. The angled cam side of each nut is toward the adapter.

Do not tighten completely.  Leave a gap slightly wider than the thickness of the M-Lok mounting surface.

When assembled, carefully place the unit on the desired location and turn the bolts, if needed. An increase in resistance indicates the nuts have begun to grip the interior surface. Now you can tighten down per manufacturer recommendations.

If either does not snug solidly, apply slight upward pressure on the adapter as if you were attempting to barely lift it off the M-Lok surface. Carefully turning the bolt while doing so, in many cases, generates a solid grip and allows successful tightening.  

Finally, it’s time to mount the selected weaponlight/laser. The installation is now Picatinny-rail simple, but don’t forget to apply forward pressure on the electronics when snugging down. That simple step minimizes or eliminates movement under recoil.  

Once complete, you’re ready to give the customer a chance to try the setup with the empty gun — while maintaining proper muzzle discipline, of course. When you’re sure they are satisfied with the results, and can reach the controls easily and safely, you’re ready to send yet another happy customer out the door.