My Review for the M4 Collapsible Stock for Glock

After the fiasco of using a Magpul UBR Stock copy for my Glock, which turned out to be too heavy for the unit, I wanted to use the lightest possible M4 Stock available to pair with my Endotactical Tactical Stock Adapter - Glock (TSA-G). After looking around some firearms forums, it turns out that the stock or factory standard M4 Collabsible Stock is among the lightest available.

I chose the standard Mil-spec M4 stock mainly because it was available, and cheaper than the other light stocks like the Colt Super-Stoc of Magpul CTR. In terms of looks, it doesn't look too bad either. I got the "ribbed" version (as opposed to the "dotted" or "ultra-thin" version. Oh, wait, those are for other things, sorry), which I assume to be the more modern one as it allows various accessories to be fitted to the stock if you so desire.

I wasn't able to measure the weight of the stock, but information from the forum threads say they are around 6 ounces, or less than half a pound. Material is reportedly some sort of ABS Plastic, and the workmanship was fantastico! No flashes or other imperfections to be found anywhere on the stock. The finish was quite good, best seen in actual because it doesn't translate very well into digital pictures.

(Video) My Glock 22 in its Machine Pistol Mode Part One

They said a picture is worth a thousand words, so a video would be even more so. That's why I decided to take a video of my Glock 22 in what I call its "Machine Pistol Mode" so people can capture a bit more detail that just the words and pictures I have posted here thus far. I intend to make a couple more over the next couple of weeks or months, depending on how much more detail I feel I can share more with videos.

Forgive the mediocre camera focus, I used only a Samsung PL120 Digital Camera. It works very well with still pictures, but apparently not very much with indoor close up videos. I hope I can rectify this on my next videos. So now here is the video itself:

http://www.youtube.com/watch?v=u4NVUuxLP20

My Glock 22 in Machine Pistol Configuration

I was generally satisfied with the Glock 23 Machine Pistol configuration that I assembled, it can easily contain short full automatic bursts into a man-sized target at around 13 meters. However, I felt I could build a better Machine Pistol, one that would enable me to shoot full automatic bursts accurately at even longer ranges. For this reason, I decided to buy a Glock 22, as I felt the recoil-reducing accessories and/or parts necessary for building a better Glock Machine Pistol are only currently available on the full-sized Glocks. 

These recoil-reducing accessories are mainly the Endotactical Tactical Stock Adaptor - Glock (TSA-G), coupled with a Magpul Utility Battle Rifle (UBR) Stock. I have reviewed these separately, you can find them here and here. Aside from this, I also used the CAA Tactical Folding Grip Glock - Small (FGG-S), and a Lone Wolf Compensator (coupled to a Lone Wolf Threaded Barrel).


'First Firing Range Session'
With everything more or less ready, I took my Glock 22 in its Machine Pistol configuration into the shooting range for the first time. I used Target Boards, at my standard range of 13 meters. First test was using the STOCK or FACTORY BARREL, with 50 rounds of Semi-Wadcutter, Teflon-Coated (SWC-TC) reloads in standard .40S&W loadings. Recoil was quite noticeable, with the UBR Stock jumping up and into my shoulders with some vigorousity. 

My Magpul UBR for Glock Review

'Magpul UBR Stock'
I was able to buy a China-copy of the Magpul UBR to go with my Endotactical TSA-G. I went with the Magpul UBR mainly because of its looks. I have seen pictures of Glocks with the TSA-G and Magpul Compact Type - Restricted (CTR) stock, and it looked awkward, as the stock looked too big for the pistol. On the other hand, the Magpul Utility Battle Rifle (UBR) looked just about right with the pistol as it is less bulky overall compared to the CTR stock.

In fact, among all the Magpul stocks, as well as collapsible M4 Carbine stocks made by other manufacturers, the UBR looks the most compact, probably after the Ace Ultralight Stock. The Ace Ultralight Stock was actually my first choice, but I just couldn't find anybody selling it in the country, or online.

The seller advertised it as a "Magpul PTS UBR", but I know better, because the unit is marked "Magpul Industries Corporation" on one side, and "Boulder, Colorado, USA" on the other side. A genuine Magpul PTS UBR would've been marked "Magpul PTS" and/or "Professional Training and Simulation". Besides, the unit was priced only have of what a genuine Magpul USA or PTS UBR.

The unit is very well made, though. The workmanship is excellent, very little flashes, no unsightly marks, and the fit of the parts are tight, almost no wobble when the stock is fully extended. The only fly in the ointment is a wayward nut that was not installed properly on one side of the unit, causing it to tilt during installation, of which up to now I am unable to correct. Nevertheless, I'm pretty happy with the unit.

The unit felt a bit rear-heavy initially, so I decided to remove all the items that I do not intend to use with the unit, namely the:
- Storage Plate and Cover;
- Quick Disconnect (QD) Sling Mounts, both front and rear, and the Screws, Nuts, Washers, and Mounting Cups.

My Endotactical TSA-G Review

'Endotactical TSA-G'
The Endotactical Tactical Stock Adapter - Glock (TSA-G) was actually the main reason for my buying a full-sized Glock. The TSA-G fits only full-sized Glock at the moment, and I felt it was much superior than the GLR440 Stock I used on my Glock 23 as it attaches to the Glock on 2 points, compared to the one point on the GLR440. Because of this, you will have better control of the Glock during recoil.

Another advantage of the TSA-G, is that you can use much more solid stocks built for the M4 Carbine, as opposed to the relatively flimsy 1" width Polymer stock of the GLR440. These two advantages I felt will enable much better control of the weapon during full-auto, not resulting in that diagonal climb to 1-2 o'clock that I found when using the GLR440 stock.

I got what is likely to be a China-copy of the TSA-G from a shop at the Makati Cinema Square (MCS). The reason I think it is a China-copy, are three things: First, is the price. The original sells for USD 150 in the US, while I bought it for only P 3,500 (approximately USD 81). Second thing is that the Retaining Pin that secures the unit to the Glock is made of Polymer, while the ones I saw on the videos for the original TSA-Gs are made of Stainless Steel. I don't think this will be much of a factor on the function of the unit, though.

Third is that there is no small ball chain that secures the Retaining Pin to the TSA-G, while the original always had one. I had to buy a small ball chain from the SM Department stor to secure that Retaining Pin to the TSA-G, and keep it from getting lost during handling.