5.56 Timeline

Advantage Arms Glock .22 Conversion Kit

I was digging though my stuff and I had forgotten that my Advantage Arms Glock 19 .22LR conversion kit came with such a nice case that has custom cut foam.

It looks like the kits now come with a little range bag instead of this hard case. While the case is pretty cool, a little range bag would be more practical. You don’t really want to be stuffing a dirty kit into the foam, as that would dirty up the foam.

Initially when I got the kit I planned to have the same night sights as on my carry guns installed. Later I heard it was suggested against installing steel sights in the aluminum slide of the .22 kit. After using it for a while, it became apparently that it was a good choice to have the adjustable Glock sight as you could adjust it for what ever particular ammunition you are using.

The magazine is a single stack 10 round capacity. It is disappointing to have such a big mag hold so few rounds.

To have the barrel threaded 1/2×28 it has to have a threaded adapter attached to the end. This prevents removing the barrel for field stripping or cleaning. Not a problem, just makes cleaning a little more awkward.

The ejector slides in the upper and has a hook that latches on to the barrel. When you reassemble this slide after cleaning, you will need to hook this extractor over a notch on the barrel. Easier to do than I can explain it.

After owning this for some years, I’ve not used it much.

I’ve not tried very many different brands of .22 in it, so I can’t say I’d have this issue with all of them, but the old cheap .22 I had would gum the kit up pretty quick and it would stop extracting reliably until it was cleaned.

Years ago I had a thread on Gemtech M4-02 suppressor and I tried that on this kit for a few rounds. The M4-02, being a 5.56 silencer, was too heavy for this kit. That weight caused excessive headspace and it would not reliably fire. I don’t believe this would be an issue with a lightweight .22 can.

I wanted to have a trainer with the same trigger and manual of arms as my Glock 19. This does that, and shoots the much cheaper .22 long rifle. But it doesn’t have the same recoil, or weight. Practicing more is great only if you are practicing perfectly. Sometimes shooting .22 can lead to sloppy shooting. You don’t want to be making bad techniques muscle memory.

In the end, I found I would rather just shoot a little less 9mm than shoot a little more .22 for training.

Ugh, I messed up

Here I am looking at the large pile of full size Recee’s Cups, I bought to give out on Halloween, hoping no kids show up so I can have all of them.

But that isn’t my mistake.

Some time back I had a Glock 19C cut for a RMR and I used it for a while. It had many merits, but I wasn’t completely sold on the setup, so I ended up getting rid of it. Later I picked up a Gen 5 G19 MOS so I would have the option to run what ever optic I would later decide to use. I wanted to try options other than the RMR.

I bought a Leupold Deltapoint PRO and a pair of Trijicon “suppressor height” sights. Got them in yesterday and installed them to use at the range today.

Mistake #1: Long ago I had read that the Leupold Deltapoint uses the same mounting footprint as the Doctor mini red dots. Nope. It uses the J-Point pattern. I should have doubled checked. Part of the reason I bought the Deltapoint is that I have many items that can take a Doctor pattern red dot, and I figured if I didn’t like it on the pistol, I could use it elsewhere.

I may still have a J-Point mount or two laying around, I’ll check.

Mistake #2: I had assumed (wrongly) that the taller “Suppressor Height” would co-witness with the Deltapoint PRO. No, it is way too tall. Now a few groups do make horribly tall Glock sights for use with the Deltapoint, but I am not going to go that route.

I’m just going to shoot with the Deltapoint for a while, then trade it for a RMR or figure out some other use for it.

I did a little bit of pistol shooting today. First I removed the Deltapoint and checked the iron sights. They were fine. The Deltapoint needed a litte of adjustment for zeroing. Initially my impacts were about 2 inches low and a inch left at about 5 yards. I made an adjustment easily using the 1 MOA clicks on the optic, and brought the group centered, but about half an inch low.

Here is where I got a little frustrated. I made an adjustment up, and was still half an inch low. So I made another adjustment up, and found my self about an inch high and an inch right.

Shooting with the dot was easy, my shots on the target tended to be touching, so I wasn’t pulling shots. It looked to me like my elevation adjustment caused the windage to shift moving the impacts right.

I dialed an adjustment down for 1 inch, and didn’t touch windage. That bought my impacts right to my point of aim.

It sure seemed to me that moving the adjustment up also shifted the impacts right. I don’t like that.

But at this point, I only put about 50 rounds though the gun with the Deltapoint. So I want to shoot with it a little more before I made a decision. Time will tell.

U.S. Military use of the Glock

In 1985 the US Military adopted the Beretta 92FS as the M9 pistol, which lead to much weeping and gnashing of teeth.

Despite the adopting of the M9 and it’s wide service, a handful of other pistols were used. For example the M45 MEUSOC M1911, H&K MK23MOD0, etc.

Some time back, some of the high speed low drag guys (Delta) were seen running around with .40 caliber Glock model 22 pistols with tan “dark earth” magazines. Around that time a longer and larger 22 round dark earth Glock magazine started to be produced. Glock fans went nuts drooling over blurry photos and when a used dark earth Glock magazine showed up they sold for ridiculous prices.

Turns out they were not the only group in the military that wanted Glock pistols. But how to get them was an issue. We already had the full size M9 in inventory, there had to be a reason to buy something else. But special mission requirements can get special equipment. So a request for a compact pistol that could be concealable was made, and that is how the G19 made it’s way the US Military.

Some ask, “It is the military, why would they need a concealable pistol?” There are plenty of time when our troops are in non-permissible environments, meeting with people where they can’t in with full gear, or working in civilian attire. Being able to conceal a handgun is a good thing. Below is a video showing MARSOC training with Glock pistols in civilian attire.

A tangential example, the USMC adopted the Glock 19M as the “M007 Concealed Carry Weapon” in 2016. (Same 19M as the FBI) The M007 was adopted for Marines that would need to conceal a pistol, such as criminal investigation units and the crew of the HMX-1 helicopter squadron.

So our military adopted the Glock 19 twice as a concealable pistol.

Glock G19MM007
G26 Gen 3 with Glock Night SightsMK 26 MOD 0
G26 Gen 4 with Glock Night SightsMK 26 MOD 1
G19 Gen 3 with Glock Night SightsMK 27 MOD 0
G19 Gen 3 MOS with Glock Night SightsMK 27 MOD 1
G19 Gen 4 w/ Night SightsMK 27 MOD 2

Yes, a generation 3 Glock with the MOS cut.

Glock won’t sell these to us. At least they haven’t yet.

What I find interesting is all the discussion about the MOS slots on various gun forums tends to be negative. Many of these internet expect say that the MOS cut is terrible and doesn’t work worth a damn, and that you should have your gun milled for the mini red dot of your choice. But oddly enough we have these high speed/low drag military folk working with them just fine.

Also, oddly enough, the military is not using the taller “suppressor height” sights. So the individuals running a Trijicon RMR, Insight MRDS, or other optic can not co-witness with their iron sights.

It is going to be interesting to see if, after the fielding of the SIG M17/M18, we will still see Glock pistols in service. After only 2 years of use, in 2018, the M007 has been scheduled to be replaced by the M18. Rumor mill is that the units fielding Glock 19s are replacing their M9 with the M17s, and holding on to the Glocks.