Tavor and P-mag interference *video*

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TV-PressPass

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So I went and bought a new P-mag to show the bolt-hold-open interference I've experienced in the past. Then did a quick easy fix with a multi-tool file. Its super short, but I personally recommend it to anyone shooting P-mags through a Tavor.

Take a look:
[youtube]4OclJREGkdI[/youtube]

P-mags can and do interact with the bolt-hold-open in a TAR-21! There's been some back and forth over whether or not this is possible. It is. You can see footage here. I realize the movement you see in this video is small, but its seems to explain previous problems.

What I believe happened to my rifle is this:
Shooting with standard p-mags caused my bolt hold open device to partially raise during operation, which in turn caused pre-mature wear on my bolt and bolt hold open.
This wear on the bolt may have been the source of some of the failure to feed jams, and bolt hold open failures I experienced at the start of the spring.
Since modifying my magazines and replacing my bolt, I have not had any further issues with the rifle.
The p-mag, e-mag, 20 rd p-mag all have the same rounded rear face. The new M3 magazine from magpul is specifically designed to address this issue in non AR-15 platforms like the SCAR and TAR-21.

Hopefully this video will help others from running into the same problems.
 
Thanks for the video TV. Now maybe all the naysayers will finally acknowledge that this is at least a potential area for premature wear that can lead to FTF and other issues. The new Lancer Advanced Warfighter magazines also have a redesigned square notch. You can also use a Dremel to modify the notch on your PMAGs as well.
 
Good to know...thanks. I'm looking at picking up a Tavor and wasn't aware the Pmags were doing that.
 
Congratulations you just to prove that the blot stop moving.

First it's not hard to see inside, just turn on a light .

On your video , of the bolt stop up 1/100 ... you still have 1/8 of free space before the bolt.
If you don't push on the bolt locking lever, by simply olding the mag. (I do not mean that you're in bad faith, just by mistake)

There is a picture of a Pmag (v shape ) in a Tavor. The bolt is not spring loaded and show it have 1/8 of free space betwin the bolt/stop.

IMG117.jpg


Maybe TV you and only you have a bad bolt lock. Maybe too long or to bulcky... and if it's that you maybe have the same problem with all mags.

How many of you have wreck there mags on this urban legend ?
 
D-boy buddy. I'm sure you're trying to make a strong point there, but it's just not coming through.

Maybe re-edit or rephrase that? I'm know my "blot" has wear from when I used un-modified mags, and my new "blot" doesn't have wear now that I shoot it with modified ones.
 
D-Boy said:
How many of you have wreck there mags on this urban legend ?
Click to expand...

Well, all I'll say is good luck sourcing replacement parts if you experience the same problems. If memory serves, TV indicated this took a few thousand rounds before he started having issues. This is more of a precautionary warning/head's up than anything else, since the new Lancer LWF is already out and the PMAG M3 should be here by next year at the latest.

In any event, should you own PMAGs and this is a concern - you can easily make a quick modification with a Dremel. Skip to the 3:30 mark.

[youtube]rDmM0eN8jhc[/youtube]
 
Ok, I just had to see it for myself.

There is nothing wrong with the rear profile of the PMAG, it is the follower that is causing the issue, when there is only one round left, the follower sits higher than a USGI/STANAG magazine.
Did you try it with more than one round in the PMAG?

Have a look.

482120_10152028368070481_1817703840_n.jpg


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553813_10152028368730481_1874332141_n.jpg


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I was too lazy to take out the bolt hold open/trigger pack for pics, but if you look at the profile of the bolt hold open tab, it is only 3mm wide and right in the middle.
So it is impossible for the PMAG U shaped rear profile to pose any problems since only the middle 3mm part catches the follower.
Go figure.
 
I've considered the possibility of the follower causing trouble too. In the vz58 AR adapter I've been present for diagnosis on that was exactly the problem. ####ty followers doing weird stuff.

However, in the video you will notice that I have two rounds in every magazine, including when I see the bolt hold open shift.

I could see a decided cause and effect with the rear profile of the mag changed. So I went with that.

If the followers really can cause a problem as well, then I'm more inclined to twyeh's solution.
 
That's interesting... Now here's a new twist: last year Magpul quietly introduced a modified green follower for their 30-round PMAG, PMAG-MagLevel and EMAG (the black follower for the 20-round PMAG remained unchanged). The differences are almost too subtle to notice, but the new follower sits about 1-2mm lower and has been slightly redesigned.

I'm not sure if I have both versions, but I'm going to check the followers on the 20-round and 30-round PMAGs to see if this makes any difference with the bolt hold open.

The real solution is that we need to be able to use 30-rounds, so that we can shoot 28-29 and then eject the magazine. ;)
 
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