Concealed Carry: Corvus Defensio UBC-43 Holster

We developed the Corvus Defensio UBC-43 Holster especially for the purpose of deep concealed carry of slim line versions of the Glock pistol series. Despite that there are similar products out there already – primarily for double stack pistols – none of them fulfilled our desires. The wish to carry a Glock 43 deeply concealed, loaded, safe and comfortable on a daily basis and still being able to draw the gun quickly pushed us to develop the UBC-43. The exceptional cooperation with the young Austrian Holster and Gear manufacturer Black Trident gave us the opportunity to transform our ideas into a high quality product.

The holster is primarily made to carry a G43 deeply concealed on the 1 o’clock or 11 o’clock position (appendix) inside the waistband below the belt line. The UBC-43 will also fit a G42, G43X and G48. If there is the special need to even deeply conceal a light/laser module on one of the aforementioned Glock models, the holster also takes the gun with a mounted Streamlight TLR6 (only). The UBC-43 is fully ambidextrous.

Please watch our YouTube video!


– Deep Concealment IWB APC Holster for Glock 43.

– Optimized for G43 but also fits G43X, G42 and G48.

– Highest possible concealment of the gun.

– Optimized for carrying a shirt tucked in.

– Ideal for all kinds of grip textures (skate board tape, rough stippling, etc.) due to total coverage of the grip by the holster body (no skin contact)

– Fits all kinds of extended mag release and slide stops.

– Fits all magazine extensions.

– Fits all kinds of iron sights (doesn’t fit red dots!)

– Fully ambidextrous (just change clips).

– Optimized for overlapping velcro belts or all kinds of belts with overlapping material to hide the mounting clips.

– Fits Glocks with Streamlight TLR6 light/laser module.

– Handmade by Black Trident out of 2,2 mm Kydex.

– Adjustable draw resistance (best function with least resistance!)

– Full protection of trigger, mag release and slide stop.

– When carrying the gun the muzzle will not point directly to groin when bending the upper body.

– Best comfort for prolonged sedentary occupation.

– Best possible freedom of movement.

– Discreet steel mounting clips for 1.5 inch belts (powder coated).

–Unsuitable for direct mounting on pants without a belt.

– Alternative velcro mounts available separately for overlapping velcro belts.

Application and Warning Message:

– Always be sure of the condition of your firearm and always treat the gun as loaded when you handle it in combination with the UBC-43.

– For safety reasons we strongly recommend to carry the gun with no round in the chamber when you are using the UBC-43. To draw the gun one has to push it out of the holster by touching the muzzle! To carry the gun loaded is at one’s own risk!

– The UBC-43 is a niche product for special needs and special situations. It does not fit every body type!

– Our understanding of deep concealment carry is the priorization of concealing the gun before other features as speed of draw or the use of red dot sights and various weapon mounted lights and lasers. This product is not suitable for customers who prioritize the latter!

– Despite several draw techniques are possible we strongly recommend to push out the gun at the muzzle with the support hand and draw it with the shooting hand!

– We recommend to put thread locker on all screws of the holster (e. g. Loctite 243). Regularly check the status of all screws!

– The holster can be used for G43X, G42 and G48 but it is optimized for G43 models!

– If a TLR6 light/laser model should be used the rubber spacers have to be replaced by the included plastic spacer. Attention: In this case the drawing resistance will be higher and the drawing angle will be different! This will require a slightly changed drawing technique! The UBC-43 is optimized for a G43 without any lights mounted!

– The steel clips are otimized for maximum discreetnes. They will not fix the holster 100% to the belt like a vice. The velcro mounts will only stop the holster from sliding down. Addidtionally the holster is fixed by the clamping force that originates between the body and the belt/pants.

HERE UBC-43 Holster is available from CORVUS DEFENSIO 



12 Responses to “Concealed Carry: Corvus Defensio UBC-43 Holster”

  1. Sasquatch says:

    Were people really asking for this? It looks like a solution in search of a problem. For the last few years I’ve daily carried a 43, 43X, and now 365XL. I’ve never had a problem with printing with any of those in a traditional holster. Oh, and my holsters don’t come with a warning not to carry one in the chamber, so there’s that.

    • SSD says:

      This is a European product.

      • Gene says:

        Some of the stuff out of Europe that I’ve seen at SHOT is pretty sketch. Like that holster for carrying without a round chambered, and your draw stroke is push down first to cycle action and chamber. I think it’s Spanish? Or the LE duty retention holster they had that I twisted a red gun out of without much effort. They got irritated and said I wasn’t doing it right… I’m sure this thing has a very limited use, but it isn’t really doing anything for me.

        • mike says:

          FAB Defense/Meprolight and whatever other associated Israeli companies were pushing that concept around ten years ago. If there’s “wait, I need to chamber a round first!” shenanigans it’s probably the Israelis.

    • BiblicalViolence says:

      This holster is what I’ve been looking for expressly for tucked dress shirt/tie attire. Not everyone’s physique is the same, carry method, tool etc etc. There is never a universal solution for all the variables. This just happens to check more boxes than not for my 43.

    • Nicco says:

      Plus the drew is a valid but very niche style know for both speed and concealment. Google Teddy Medina. It’s definitely not for most people (including me) but I think some end user’s will benefit.

      • James says:

        Teddy was fast no doubt, you just know there had to be a whole series of vids on him and his sparrows tricks.

    • We absolutely know that this holster is a niche product. It´s not made for everyBODY. As replied earlier by SSD: It´s a european product. Austrian to be precise. Carrying a gun here is not the same as it is in the majority of the states of the US. Also clothing style differs.
      I (the developer) experimented a lot with carrying a gun on and off duty on a daily basis for 2 decades now. For my purposes deep concealment is pinnacle. So I carried a G43 for a while with a Clip Draw. I liked the position and the concealability but I didn’t like safety and drawing. So I came up with the UBC design. For me it’s the perfect solution. I have my G43 with me always and everwhere without being noticed by anyone at all. And in addition to that the comfort of carrying a gun is more than with any other holster I have tried.
      In the professional area the design can also be beneficial if you have to deal with counterparts that try to accidentally grasp a concealed gun at you at the typical areas of your body or looking for a print.
      For sure this is not a product for people that are used to (or need to) carry pocket artillery with light, laser and red dots and generally do not have to care about the above mentioned situations.

  2. Ramazan says:

    JJ Racaza had a similar deep concealment holster years back. Check out The “.FIVE-O HOLSTER” by JJ Racaza on youtube.

  3. Nicco says:

    That’s great information. I always really appreciate it when developers share their use context. I think it’s inherently beneficial to understand about niches even if you’re not in the niche. It can be easy to develop a very myopic view unless you actively work against it.

    I also like that you mentioning defense against gun grabs. That was one of the elements that I found really intriguing about this design.

  4. Russ says:

    Does seem to fit the nitch for when you’re wearing more formal clothing. I am not knocking it at all. Tried all kinds of things from belly bands to the Enigma. This one looks interesting because you seem to be able to deploy with the shirt tucked in. Looks like it comes up between the shirt and pants. May actually be quicker than untucking the shirt.
    My only concern is will it stay holstered when sitting and bending over frequently. Will the body inadvertently force it out of the holster sometimes?
    Interesting concept!