After handling the DP-12 for a short while I immediately thought of ways to make it better. The first issue I realized was the fact that the DP-12 has two barrels. Of all the reviews I have read and YouTube videos I have seen, no one addresses the double barrel problem. Traditional double barreled guns, like double barreled rifles, have regulated barrels. What does that mean? The barreles are set so that their projectiles will converge at a given distance. For example at 100 yards, both barrels will hit at the same spot. I was curious if the DP-12 was designed like this so I called Standard Manufacturing. Unfortunately the barrels are positioned parallel to each other. According to the technician that I spoke with, they are satisfied with hitting a 10″ steel plate at 50 yards.
Having test fired slugs at past 100 yards there is a significant difference in point of impact for both barrels.
All the reviews I saw said you could either zero for one barrel or try and zero for the average of both barrels. However this is a compromise. You could be smart and zero the back up irons to one barrel and zero the red dot to the other barrel. However I am not a fan of iron sights. I wanted to use two red dots. I saw a 3Gun shooter do this for his open division shotgun. He used twin Burris FastFire red dots. One in front of the other. I did not understand why he had done this so I asked. He has one red dot zeroed for bird shot and the other zeroed for slugs. He leaves both on and has made his own pseudo BDC reticle. So I reached out to Primary Arms and told them my idea. They were gracious enough to send me two of their Advanced Micro Dots to test this idea out. I needed to make sure that the twin Micro Dots were at the same height so Midwest Industries sent me two of their QD mounts. The Primary Arms red dots have worked marvelously. They hold up to the recoil of the DP-12 and the Midwest Industry QD mounts keeps them locked to the top rail. Right now I have them zeroed for slugs out to 25 yards. That is based on the stereotypical target distance for an upcoming night match in two weeks where I will be using the DP-12.
Below you can see how far apart the two red dots are. While at this distance there is not a huge difference it will matter at further distance and can mean hitting the target or missing it entirely.
For iron sights I went with Diamond Head USA integrated sighting system. The diamond shape of the sights makes it much easier and quicker to align them. Although it is not necessary for a shotgun, the rear sight aperture can be stored in either position. Which is an issue for other folding sights like my Troy rear sight on my Troy Defense Carbine. The rear aperture cannot be flipped back and then folded, the aperture will hit the top rail.
For a shotgun I do not really need a rear aperture so I can flip the rear aperture flat and get it out of the way. The shape of the housing is also diamond shaped and lines up instinctively with the front sight.
As you can see in the top photo above, I added a Magpul QD RSA. This is great for the front end of the shotgun but I wanted a QD sling point in the rear. I was able to install a Magpul QD sling cup onto the stock. You can see it in the photo below.
While this works, the problem is it doesn’t work well with the way the gun is balanced. The sling does not want to stay wrapped around the butt stock and then the DP-12 hangs oddly. I decided to use a spare sling loop that does work with the rod below the QD sling point. This is makes for a more balanced point to secure my Magpul sling. I feel that Standard Manufacturing could machine QD sockets into the machined upper receiver. That would make the DP-12 more modular for sling options.
The other upgrade I made was to swap out the factory vertical grip. I did not like the size and shape of the factory vertical grip. The owner’s manual cautions you to only use their vertical grip. I think this is somewhat related to the issues some people have had with the Kel-Tec Shotgun and using inappropriate vertical grips. If you look at the factory vertical grip, it has two bolts that screw thru the picatinny rail lugs. This is exactly how the Magpul RVG works and has had great success on my KSG and many others. So I grabbed my spare RVG and installed it.
I do like the MOE accessory slots that allow the shooter to add any accessory to the side but I went with maximum light and used my SureFire M900 and 1,000 lumen turbo LED head to shoot in the dark.
Another way to get the most out of the DP-12 is to use Aguila Minishells. Aguila sent over some mini slugs for me to test and I was able to fit 22+2 into the DP-12. 24 mini slugs weighs just a little over 2 lbs. So you are adding 2 lbs to the weight of the DP-12.
Both the DP-12 and KSG have the same capacity magazine tubes. And I saw a video by Hank Strange where he was able to fit 12 rds of mini bird shot into each tube of his KSG. So technically that should apply to the DP-12 as well and you can get 26 rds of bird shot into the DP-12. I will have to see if Aguila can send me some mini bird shot to test that as well.
So far I have enjoyed modifying the DP-12 to suit my needs. It is a unique firearm and I want to get the most out of it.