Gear, Gun Reviews

Mouse Gun Match Up – Sig Sauer P365 vs. Diamondback DB9

This is a series I’ve been wanting to do for a little bit, and after reading, you’ll probably see why. I’ve always been fascinated by pushing tiny guns to the absolute limit of their performance. I know what you’re asking yourself…Why? Is this guy certifiable? Sure, most of these guns aren’t really intended to shoot targets past about 7 yards or so, but why not?  I’ve never been one to accept the status quo, or shy away from doing things some people might call… “offbeat”. Another reason this series is exciting for me is that I do feel like it’s going to help people make some better-informed decisions about guns aimed toward the same market. The format is going to be generally the same, looking at 3 categories: Concealability based on specs and actual practical handling, aftermarket support for sights, triggers, holsters, and the like, and finally, shootability, how quickly can you put rounds on target in it’s stock form, and how the gun performs in accuracy and ballistics.

So, without further ado, I present the first of hopefully many… Mouse Gun match ups.

Sig Sauer P365 VS. Diamondback DB9

Alright, you got me. These guns are actually on the borderline of what’s truly considered a Mouse Gun, but this pits one of my older favorites, the DB9, against what is quickly becoming one of my new favorites, the P365.

First things first, let’s throw up a boring spec sheet comparison.

So, as you can see, the P365 isn’t that much bigger than the DB9, except in the width, and weight departments, which is where the single stack frame makes a considerable difference. Personally speaking, the difference in width and weight make the difference between being able to pocket carry the DB9, versus having to belt carry in a holster. Sure, in a perfect world, everybody carries a mid-size gun, but sometimes you need a gun to toss in your pocket and go, which is kind of the point of these guns… So, point in concealability definitely goes to the DB9.

Let’s Accessorize!

The next thing we’ll look at is aftermarket support. This can be tricky one to nail down. Why? Well, some people want to put all manner of things on their guns, and some don’t. So then, what’s the most important aftermarket accessories that need to be considered? Without a doubt, holsters and sights. Without a vessel to safely carry the gun on your body, it’s pretty much useless, and if you can’t find new sights to replace the factory dovetail protectors that come on most guns, then chances are, there’s not a lot of other support either. So, who wins here? The DB9 has no aftermarket sights, lasers, or triggers available, and only a few shops making holsters. The P365 on the other hand has options from almost every major holster maker, and a TON of the small specialty shops are also molding/bending holsters for these (I use the Alpha from Squared Away Customs). There are also some custom parts available from Gray Guns, and Sig is making a weapon mounted light, and laser sight dedicated to the P365 from their Electro-Optics Division. Hands down, the P365 wins here, and I’d say it’s mostly because of the size, resources, and notoriety of the manufacturer rather than anything specific to the actual gun.

But what about shooting them? Ya know, the primary thing guns are supposed to do..? Spoiler alert; the Sig wins hands down.

The first thing I did was one a couple of basic shooting drills to test different aspects of the gun. Since I’m mostly interested in the performance of the gun itself, I stuck with low-ready starts instead of drawing from a holster. The first was a Bill Drill from 7 yards away, which tests putting multiple rounds on a single target, and a standard plate rack, which lets us test multiple target transitions. Put simply, the better sights, trigger, and slightly larger grip made the P365 FAR faster and more accurate. 

When it comes to accuracy and ballistics.. it’s time for yet another… boring table of data.

One thing I found interesting on the ballistics side is the velocity of the Cor-Bon. I knew that little bitty light bullet likes short barrels, but even with that in mind, you’ll still generally see a velocity gain out of barrels up to 4-5”, albeit smaller gains as the barrel increases over the SAAMI standard 4”. To me, this is a testament to Cor-Bon’s commitment to designing a load for a very specific purpose and knocking it dead. As far as accuracy goes, shooting these guns at 25 yards isn’t for the faint of heart, or fuzzy of eyesight. Why test at 25 yards, when you’re unlikely to ever shoot it past 7? Like I said at the beginning, I like to push things past design parameters just for grins, fully knowing the results will probably be less than desirable. Besides, I’d already proved both guns were way capable of keeping shots inside the A-Zone at 7 yards, so why not push the limits? I think the group sizes from the P365 are impressive, and it’s hard to really blame the DB9 for not doing better. The incredibly small sights made it near impossible to feel like I had a consistent sight picture on the target.

But What Does It All Mean In The End?

To sum things up, I think for the average shooter, in the market for a small, concealable 9mm pistol, the P365 is the clear winner in this match-up. Now, if you’re looking for a niche gun to fill a pocket carry or similar role, I would absolutely recommend the DB9. It’s still pretty much the smallest 9mm gun on the market, and is way capable of getting the job done.

Leave a Reply

Your email address will not be published. Required fields are marked *