Mesa Tactical has been upgrading police shotguns for many years. Their range of accessories fits many popular models, including the legendary Benelli M4. But do those same parts also fit on a Turkish clone like the Aksa S4? Let’s find out!
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Aksa S4 Background
Urbino Tactical Stock with Cheek Riser
There are two Phillips screws that hold the recoil pad on the stock. With the recoil pad removed, the 6mm hex head bolt that attaches the stock is accessible. This particular one is very oily.
Once the old stock is removed, the Urbino can go back on. Installation is very similar but there are a few notes. Make sure to use the spacer or sling loops between the stock and receiver, and be sure to add the rear sling loops if you want them.
One difference between the S4 and M4 is the length of the bolt that retains the stock. The Urbino includes a shortened screw but it is still too long for the S4. This was a simple fix though, as the factory thick washer can be substituted for the Mesa washer. Be sure to use the recoil plate under the washer!
Now it’s time to install the cheek rest. Attach the four screws to the nuts through the holes in the cheek rest. A 1/8″ Allen key is the appropriate size. Flex the wings of the cheek rest out and fit it over the slots in the stock. I tried several heights before settling on one. Once the cheek rest is in place, tighten the set screws then snap the recoil pad into place.
SureShell Carrier with Reflex Dot Mount
One of the biggest weaknesses of shotguns is magazine capacity. Ammunition management is a constant focus when using a shotgun. Putting extra shells on the left side of the receiver is one of the most popular ways to add quickly accessible ammo to a scattergun.
Remove the Picatinny rail by loosening the flathead screws. The SureShell holder re-uses three of the factory screws because the thread pitch is different. Note that the rubber strip that protects the gun’s finish should be attached before the carrier is attached to the gun. The manual also recommends applying thread locking compound on these screws, which I did.
Screws are also included for mounting the red dot to the SureShell. This mount is RMR-footprint so there are a lot of available options.
The Truckee sits in the front cap, which slips onto the barrel ring. Note that the small semi-circle cutout aligns with the bottom of the barrel. The handguard slides onto the barrel assembly and seats in the cap. Now the two small rear caps can fit into the rear of the handguard. Everything slides back onto the magazine tube and is locked into place with the magazine tube cap.
There was no real difference in installing the Truckee onto the S4 as opposed to the M4. It all slipped right together and tightened down nicely. One important note from the manual is that M-LOK accessories should not be installed until the handguard is mounted on the gun.
This leaves us with a gun that handles better and has more features, but how does it run? We’ll leave that for next time, but I have something like 600 shotgun shells on hand to put through the S4. Stay tuned for Part 2, coming as soon as I can get sufficient range time.
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