The Rimfire Report: HUSH Holsters Suppressed MK IV Adapter

Suppressors on most handguns are pretty silly for most people and most applications. One of the rare exceptions to this is suppressors on .22LR handguns. The MK IV, although not specifically designed as such, has evolved into one of the best suppressor hosts over the years. With a fixed, often very accurate, pre-threaded barrel, the ability to mount optics, it's often the first choice of many for a first pistol suppressor host. However, one drawback of putting a suppressor on any pistol you plan to use at the range is that there’s typically no good place to put a hot suppressor-equipped pistol when you’re not using it. Today on The Rimfire Report, we’re checking out a great addition to the HUSH Holster lineup - their MK IV adapter, which solves this problem.

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The Rimfire Report: HUSH Holsters Suppressed MK IV Adapter

Tables burn, the ground isn’t a particularly good option, and standing there like an idiot with an empty gun with a hot suppressor in your hand doesn’t sound like a lot of fun either. That’s why today we’re going to check out a very clever and simple 3D-printed solution that makes your suppressed Ruger MK IV compatible with the HUSH USCH (Universal Suppressor Compatible Holster). In addition to giving you a place to put your suppressed plinker when you’re loading mags and taking care of other range tasks, I think the HUSH also consequently turns an already fun plinker into an even better suppressor host.

As with other HUSH Holsters products, both Ruger MK IV Adapters are 3D-printed. The Ruger MK IV adapter comes in two varieties, one for mounting a light to work with a corresponding HUSH Holster, and another that foregoes the light but is instead compatible with a specific “No-Light” HUSH Holster. Both varieties of adapters also allow for the choice between a Picatinny rail top section for mounting red dot optics or for an RMR/Holosun 507C pattern for direct mounting of optics to the adapter. I’ve been testing out the Picatinny rail version.

Installation

Installing the HUSH MK IV adapter was pretty easy. When you order the kit from HUSH Holsters, it comes with everything you need, which isn’t much. Just some hardware, the piece itself, and a small spacer that will keep everything aligned perfectly once it's installed. I decided to try out the pistol with just the iron sights at first, but attaching a Picatinny-compatible adapter or red dot is easy enough as well, and the 3D print didn’t seem to affect the quality of the attachment at all.

At the Range

The MKIV Compatible HUSH Holster is honestly more of a quality-of-life upgrade than a requirement at the range. While you can get away with setting your guns down on a table with a .22LR gun, I also use my HUSH for larger pistols, which will burn tables if I set them down while they’re hot. Having the holster there is much more convenient, and also allows me to do other things and have the gun handy. For reference, I’ve mostly been using the HUSH Drop Leg attachment, but Spencer and the guys over at HUSH also offer a belt-mount as well as a mid-ride attachment, depending on where you like your draw to be.

A lot of people are often curious about the “retention level” of the HUSH Holster. Personally, I would say it falls somewhere between a Safariland ALS and a passive Kydex holster. While the HUSH does feature active retention, it's nowhere near as locked up, and you can forcefully remove the pistol from the holster if you apply enough pressure. However, I’ve spent a lot of time running around on the range, hopping in and out of my truck, doing burpees, and sprinting, and the holster has held my Glock 45, Ruger MK IV 22/45, and my SIG P322 without issue. HUSH specifically states that they are not duty holsters, so I think it's not fair to expect them to have the same level of retention.

If you’re interested in trying this system out for yourself, the biggest downside is that it's going to cost you about $200 or so if you don’t already own a HUSH Holster. If you do already own a HUSH holster, you can pick up the adapter all by itself for just $25. I’d highly recommend one of these for anyone who is looking for a better way to bring their suppressed Ruger plinking pistol to the range, or for those who just love the idea of carrying around a suppressed MK IV in their belt throughout their day. As always, thanks for stopping by to read The Rimfire Report, and we’ll see you all again next week!