Diamondback DB9R 9mm Carbine ~ Video Review

By Graham Baates YouTube personality, Graham Baates, gives us a video review of the Diamondback DB9R.

Diamondback DB9R 9mm Carbine
Diamondback DB9R 9mm Carbine

G B Guns

USA – -(Ammoland.com)- If you haven't tried a 9mm carbine yet you're missing out.

They're less expensive to shoot, create less recoil, less noise, can be shot almost anywhere a handgun can be shot, and generally make for a fun time.

They can be used for training, to introduce new shooters, or in any of the growing new shooting sports based around the pistol-caliber carbine.

We've been fortunate to cover a few firearms from Diamondback Firearms.  The Florida-based company began as a boat maker (which they still make), but when their business grew to the point that they could no longer wait on third-party part sources they began making their own.  As any of us would agree to have the machinery on hand and not become a firearm manufacturer would be a waste of good machines!  Diamondback knows this well and began making tools for land-based use.

Diamondback DB9R 9mm Carbine

Diamondback DB9R 9mm Carbine
Diamondback DB9R 9mm Carbine

Diamondback Firearms grabbed our attention with a pocket pistol chambered in 9mm, and really got our attention with their Diamondback DB9R 9mm Carbine which shoots sub-moa and sells for under the AR-10 price barrier of $1,000.  Naturally, when we learned they were working on a 9mm rifle we wanted to give it a try.

While the internet may have some nay-sayers about Diamondback, we've had nothing but good fortune.  We got our hands on an early-production model of the DB9R rifle and it wasn't perfect.  Rather than blab about issues we did took the route that benefits gun owners; we contacted Diamondback and sent it back.  Diamondback resolved the issue and the results are seen in the video above.

No complaints here.  If you're going to invest in a firearm why not also invest the time to talk to a manufacturer if you have an issue?

So what makes the Diamondback DB9R 9mm Carbine unique?  Here are the specifications direct from Diamondback's website:

  • Caliber: 9mm Luger
  • Barrel: 16″ Black Nitride
  • Barrel Twist Rate: 1:10 RH
  • Bolt Carrier: 9R Bolt Carrier,
  • Handguard: 15” Keymod Rail
  • Pistol Grip: Magpul MOE
  • Stock: Roger's Buttstock
  • Mag: 31 Round Glock style plastic mag
  • Flash Hider: A2
  • Weight: 6lbs
  • Overall Length (Stock Collapsed): 32.5″ Overall Length (Stock Expanded): 36”

For a closer look at the Diamondback DB9R 9mm Carbine see the tabletop review video below.

About Graham Baates

“Graham Baates” is a pen name used by a 15-year active Army veteran who spent most of his time in the tactical side of the Intelligence community including tours in Afghanistan and Iraq. Post-Army Graham spent some time in the 3-Gun circuit before becoming a full-time NRA Certified defensive handgun instructor and now works as an industry writer while curating a YouTube channel on the side. Visit Graham on Youtube .

  • 10 thoughts on “Diamondback DB9R 9mm Carbine ~ Video Review

    1. Just returned from the range used 4 different mags and experienced multiple jams with all. The rounds are jamming on the bottom of the feed ramp on 8 of 10 attempts. Very nice “looking” rifle, but not very effective as a weapon. Now I will contact Diamondback and see what results from the call. This rifle was bought as a unit, already assembled. RH

    2. Fine article and presentation. It played a big par in my decision to purchase a DB9RPB10. I’ve subscribed to your youtube channel. Thank You!

    3. I like the fun aspect of it. I’m thinking a 10mm would up the performance level for defense or say “hog” troubles. The fit and finish were much better than I expected.

    4. Unique? Hardly. Look at Quarter Circle 10.. Before that was Double Diamond.. Palmetto State Armory has these too, but they probably rebrand theirs.

    5. I don’t know why you say 50 yards is stretching the 9mm, considering the experiences in both World War 1 and World War 2 on battlefields.

      I used to own civilian version Uzi, 16 inch barrel, and on a man size Target it was good at 200 yards. Those were the days in which I could still use open Iron Sights, rather than what I have to have now, which are Optics, but the 9mm or the 45 is good to about 200 yards!

      Should there be naysayers in the group about my statement concerning yardage, here’s my challenge to you: stand at two hundred yards, with body armor on, and I’ll grab a carbine in 9mm, or 45 ACP, and lob some round your way!

      Yes, I agree, standard yardage is going to be from 0 to 100 yards 95% of the time, for both the 9 mm and 45 ACP carbines. However, for that other 5%, should it come in play, both the 9mm and the 45 ACP can still get the job done up to 200 yards.

      1. JR Bailey I’m not arguing that, but to group at that distance is to leave a lot to chance. Wind and other elements outside of our control can play too much of a role and that’s not fair to the rifle. That’s why we don’t group 9mm past 50yards and group most rifles at 100yards.

        1. I can see that you and I have two different definitions as to why we want a weapon to group as small as possible.

          I’m not talking about punching paper for paper’s sake, or three gun this, or competition shooting that, I’m referring to the exact rationale for the very existence of the weapon in your review: for one human being to use it in a deadly confrontation against another human being.

          This is the whole reason for target practice, and for attempting to get our groups as small as possible. However, what a legitimate group is, I would argue is defined according to distance from Target.

          Time and again, literally every component and professional of self-defense techniques, continue to concentrate upon the phrase: “To put as many rounds On Target as fast as possible.”

          This is subject matter which far too few people are willing to discuss in an open venue these days, because far too many of us have been infected with the disease of political correctness.

          Grouping is merely the “fine print” under the rubric of target practice! The reason we target practice is to allow us under stressful situations, to put as many of those rounds as possible in our magazines on the target, which is another human being intent upon doing us, our families, or those around us, deadly harm!

          This means in real-world terms, striking the other human being in an area between the waist and the neck most of the time. The polite phrase used for this goal is “Shooting for Center Mass’.

          Concerning the distances which I raised, and my pointed mentioning of Battlefield historical experience, is that if you shoot your assailant in the gut at 200 yards with either a 9mm or 45 ACP, it will still get his or her attention! It will impair them, and that’s lessens their ability to take your life from you.

          Yes, I understand that in today’s legal atmosphere, once we get past about 40-50 feet, we can be in danger of legal Jeopardy from anti-gun prosecutors and cops.

          However, in light of the Antifa and Black Lives Matter violence, where we could very well face a mass wave of people 20, 30, or 40 yards away intent upon murdering us, the whole equation of what is an acceptable shooting distance, and thus what grouping would meet minimum needs, becomes a whole new question.

          Same thing for being attacked by someone in a vehicle: 100-200 yards becomes a real world distance.

          My point Remains the Same: regardless of distance at which we practice, target practice, I’m not saying the goal is so we can cover a five-shot hole with a dime, or a nickel, or a quarter, and then drink for free at our local bar celebrating amongst our friends, we engage in target practice and ‘group’ so that we know what our weapon will do, when we are forced to use it.

          That use, and here again is where I believe we differ in our definitions, is legal deadly intent. We want to stay above ground, and we want the members of our families to stay above ground, and we even want the stranger whom we have never met in our lives, sitting two tables over from us in a restaurant, to stay above ground, when some armed Thug comes in attempting to take our lives from us.

          I hope this helps explain and Define more clearly what I meant with my original post.

          Lastly, I really wish you and your wife would run a complete mag through each series, to make sure both the mag and the weapon cycle under real-world conditions, rather than just the three that you use. Thank you for your time.

          1. Not a problem. I understand your point. I’ve seen combat and been through hundreds of hours of defensive shooting training. As reviewers it would not be fair to the manufacturer or the reader if we let our skills taint the view of the product. Erika once spent some time pinging an 8″ target at 35 yards with the Diamondback DB9 handgun, but the average consumer should not expect the gun to easily accomplish that for them. That was skill. That’s part of why we try to normalize as much as we can and take the shooter element out of our tests and just show what the firearm is capable of.
            When it comes to magazine testing we do test full-mag +1 when the magazine is manufactured by the gun maker or made for that gun. In the case of aftermarket Glock magazines in a carbine there are too many variables that could make it look like a firearm failure when in fact it’s most likely the magazine. When we test different loads we use three rounds to test if it will feed, operate the action, feed again, and be able to lock the action open after a last shot. Anything more than three would simply be wasting expensive ammunition.

            I hope this helps.

            1. Thank you for taking the time to respond to my latest and clarify why you and your wife do what you do, in your reviews.

              I understand much better now the parameters for how you test, and why you test as you do, for which I thank you.

              I shall continue to watch your reviews, because you provide valuable knowledge that can be useful, should I ever be able to afford some of the Weaponry you review.

              Basically, I’m poorer than dirt, and own a whole 3 weapons, shotgun, sidearm, 1 AR.

              Hopefully, I can improve that so-called ‘Arsenal’ ( by anti-gun standards) that I have to be a bit larger within a year or two, and hopefully with some more ammunition.

              Basically what I’m looking for is a good truck gun at some point, that can shoot 9mm or 45 ACP, so that I can have one kind of ammo while I’m carrying and driving around.

              Thank you again for your time, and your clarifications.

              Take Care.

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