A few weeks ago we checked out an auto-advancing target system from Lyman. Next up from TTAG’s First World Problems Desk is a solution from GEMTECH to avoid the finger-bleeding terror of having to screw a suppressor on and off a firearm. Often, this involves as many as a dozen full rotations! Thankfully, GEMTECH’s new QDA mount system allows near-instant mounting and dismounting of a rimfire suppressor with none of the dizziness or shortness of breath.
Okay, okay, I’m being an ass. The purpose of the QDA — or quick detach adapter — is greatly speeding up the suppressor mounting and dismounting process so the owner can move it rapidly between multiple firearms or quickly and easily break their setup down for transport, then get it right back into action when needed.
It’s also a nice way to avoid damaging the fairly fine threads on 1/2×28-threaded muzzles and suppressors. Cross-threading these things can be an expensive mistake. Especially if it isn’t noticed and it causes a baffle strike(s).
Installation is pretty simple. The larger, GEMTECH-branded half seen above is installed into the suppressor, threading right into its normal 1/2×28 mount end. On the firearm’s muzzle goes a 4-lug adapter.
To use the system across multiple guns, additional 4-lug mounts should be purchased. Via Silencer Shop, it’s $129 for the initial system — one suppressor-side mount and one gun-side mount — and $32 for additional gun-side mounts.
Success! A minute or two later and we’re ready to go shooting.
The QDA system adds 1.508 ounces of weight and 1.15 inches of length to your sans-QDA setup. Neither of these figures is substantial in the big picture, but with most rimfire suppressors weighing from about 4 to 5 ounces it means the QDA adds around 35% to that (and 22% to the length of my AAC Element 2).
On the range, the QDA works as advertised. The fit is snug and precise, with the suppressor locking in place just like any of the popular-since-forever 3-lug QD mounts seen on, in particular, all sorts of 9mm sub guns. There’s no wobble, and I suffered no baffle strikes during slow and rapid fire after mounting and dismounting the can a zillion times.
Unfortunately, the actual mounting process wasn’t as easy as I had hoped. The adapter is actually “keyed,” with one lug larger than the other three. Therefore, the suppressor must be timed in the correct rotational orientation for male and female halves to have a birds and bees moment.
While I can understand this for repeatability purposes such as ensuring consistent point of impact shift, it does slow down the process. Instead of fumbling around trial-and-error style, attempting to slam the suppressor on in one rotation after another until hitting the jackpot, I began looking at the female end and noting where the larger lug recess was. Knowing that it needs to be held in approximately the 9:00 position in the case of my CZ Kadet Adapter, putting it on each time became quick and easy without failed attempts.
However, the big appeal to this system for me is the ability to swap the can from gun to gun. And as the gun-side adapters are highly unlikely to end up timed the same way when installed on different guns, this whole memory trick goes out the door.
Brass tacks: GEMTECH’s QDA mount system works as advertised, but is an expensive solution for a niche “problem.” Actually, perhaps its biggest value isn’t even advertised: preventing cross-threading and normal thread wear-and-tear on your guns and suppressor. It does add a bit of length and weight, and it doesn’t actually mount as quickly as I had hoped due to the need to time it properly, but it’s otherwise of solid quality and proper function.
Specifications: GEMTECH QDA Quick Detach Rimfire Suppressor Adapter
Thread Pattern: 1/2×28
Rating: .22 WMR and smaller rimfire calibers
Weight: 1.51 ounces
Length: 1.15 inches
MSRP: $129.99 for both halves, $32.99 for additional 4-lug mounts
Ratings (out of five stars):
Function * * *
Mechanically it’s totally solid, but the keyed-rotation design slows down installation of a product designed specifically to facilitate rapid installation.
Utility * * *
It does what it’s supposed to, but the QDA seems like it’s geared towards a niche market. The buyer is someone willing to spend $129 to convert a direct-thread, rimfire suppressor to a QD suppressor that works on a single gun, or that plus another $32 each to make it work on other guns. It adds length and weight, and realistically only saves a few seconds of time.
Overall * * *
The GEMTECH QDA is cool and fun. It’s satisfying to press down against that spring tension and quick-install and -detach a rimfire suppressor. Unfortunately, it isn’t as fast as it could be and I think its biggest value is probably in protecting your threads.