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Posted: 4/21/2014 10:13:30 PM EDT
[#1]
Is there any chance a commercial stock has been mixed with a mil spec tube?
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Posted: 4/21/2014 10:59:55 PM EDT
[#2]
It happens.
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Posted: 4/22/2014 5:19:15 AM EDT
[#3]
My ACS is pretty loose as well, just noticed a few days ago which was minimal then, now its a little ridiculous (just as bad as a standard M4 stock).Anyways, Ive been doing a little research on it, and the majority of the time a rep from Magpul will interdict and tell you to send it in to them. So if I were you Id contact Magpul.
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Posted: 4/22/2014 5:53:34 AM EDT
[#4]
Quote HistoryQuoted: Is there any chance a commercial stock has been mixed with a mil spec tube? That's what I was thinking. Mine has no play.
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Posted: 4/22/2014 6:35:14 AM EDT
[#5]
My ACS had a little play so I put strips of electrical tape on the top and sides of the buffer tube until it was snug. No movement now and I don't have to send anything out.
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Posted: 4/22/2014 7:02:52 AM EDT
[#6]
Quote HistoryQuoted:
My ACS had a little play so I put strips of electrical tape on the top and sides of the buffer tube until it was snug. No movement now and I don't have to send anything out. That's a good idea, will give that a try. Mine isn't super-loose, just enough to notice when I shoulder it. |
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Posted: 4/22/2014 7:06:42 AM EDT
[#7]
I just called Magpul, they say it's supposed to move a little bit. Not sure why, but I'm not going to bother sending it in if that's the case.
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Posted: 4/22/2014 2:26:55 PM EDT
[#8]
Quoted:
I just called Magpul, they say it's supposed to move a little bit. Not sure why, but I'm not going to bother sending it in if that's the case. To clarify, the Friction Lock of the STR is designed to mitigate rotational movement. It does not do much for fore/aft movement caused by the Colt-design single shear locking pin common to all M4-style carbine stocks. Also, we design our stocks to be easy to adjust in all environments (versus super tight like some other makes) with the supplemental Friction Lock being optionally used to take up some of the excess rotational movement. However, the effectiveness of this supplemental lock will vary depending on the dimensions of your particular receiver extension. If you have some calipers you can always report your findings to our Tech Support Dept. to see where your tube sits. |
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Posted: 4/22/2014 2:57:12 PM EDT
[#9]
My STR moves a little bit when the friction lock is not on, but when the friction lock is on its nice and snug.
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Posted: 4/22/2014 7:29:19 PM EDT
[#10]
I came across this webpage when I was using a STR (have since swapped out for a B5 Enhanced SOPMOD). If you are up to adjusting the locking mechanism of your STR this is a worthy read.
Tighten up your Magpul CTR Stock |
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Posted: 4/23/2014 4:49:25 PM EDT
[#11]
Quote HistoryQuoted:
That's what I was thinking. Mine has no play. Quote HistoryQuoted:
Quoted:
Is there any chance a commercial stock has been mixed with a mil spec tube? That's what I was thinking. Mine has no play. Ditto.. Mine is rock solid when locked down... Do you have a some calipers to measure the opening? |
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Posted: 4/23/2014 6:17:07 PM EDT
[#12]
Just took measurements.
My Colt receiver extension is 1.155ish. The thousandths measurement varied based on position and how the calipers were rotated, but the range was 1.152-1.158. The measurement I got from the stock was 1.16ish. Again, couldn't get an exact measurement with calipers, but close. I was not able to do the above link to the STR because I couldn't get the pin out. The battery tubes were in the way, and I didn't feel like drilling the rivets out. |
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Posted: 4/24/2014 6:02:26 PM EDT
[#13]
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Posted: 4/24/2014 7:26:47 PM EDT
[#14]
I have owned 4-5 STRs as I liked the cheek weld and the ability to access the battery compartments without taking the stock off. I purchased 2 new, and then 2-3 on EE. I also strung the purchases out over a period of 2 years.
All of them had a noticeable and annoying wobble on a variety of Mil-spec buffer extensions. I'm not saying that each STR was completely loose on every buffer extension, just that if I took a CTR or SOMPMOD and rotated it around to all of my buffer extensions, both would be much tighter, with much less (if any) wobble. Buffer extensions tried: UTG Pro 6061 Larue 7075 BCM 7075 Damage Industries 7075 Spikes 7075 PSA 6061 PSA 7075 LMT 7075 The fact that these STRs were purchased over a course of 2 years lends weight to the argument that the looseness was not a "batch" issue, but rather "as designed". Even though many tend to think it is ugly, If Magpul would alter it in order to get it to lock up as well as the CTR, It would probably be my favorite "non-clone" stock.
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Posted: 4/24/2014 9:59:58 PM EDT
[#15]
I have several. Some wobble, some don't. It doesn't matter.
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Posted: 4/25/2014 10:31:55 AM EDT
[#16]
When I first read about the STR having more play than the CTR I was leery about getting one. My CTR is rock solid. Anyhow when I got my STR and checked it out I did not have any play to it. It is a milspec version on a milspec spikes buffer tube.
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Posted: 4/25/2014 4:57:24 PM EDT
[#17]
Went to the LGS today and they had two other STRs in my same color. They were nice enough to let me try them on my extension. One was a bit tighter than mine, the other looser. I bought the tighter one. Extension is a mil-spec from Colt.
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Posted: 4/25/2014 9:23:28 PM EDT
[#18]
I have two... One on a RRA commercial tubed rifle and a mil spec Spikes. Both are snug. Could have been a bad run maybe?
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