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View Full Version : Umarex Colt M4 .22LR buffer tube Commercial or Milspec?


lewisracing
01-11-2011, 9:20 PM
I have a Umarex Colt M4 .22LR. I bought a Magpul CTR Commercial stock for it, and when I put it on, it was looser than the Umarex stock.

Has anyone tried to put a Milspec stock on this gun to see if it is a Milspec size buffer tube?

I have already looked at the threads at the front end of the tube, and it does not appear to be Milspec.

Don't respond with smart***** comments like, "why don't you measure the tube", because sorry, I dont have a tool that will measure the difference between a 1.15" and 1.17" tube. I want to hear from someone who actually put a Milspec stock on this gun and knows that it will fit. I don't want to order a Milspec tube if it's not going to work, and the commercial tubes are too loose for my preference.

BHP FAN
01-11-2011, 11:46 PM
I have read that it's the Milspec that fits. Let me know if you find out for sure, as the ''rattle'' drives me nuts.

lewisracing
01-12-2011, 12:06 AM
I have read that it's the Milspec that fits. Let me know if you find out for sure, as the ''rattle'' drives me nuts.

Yea it would drive me nuts too... So hopefully there is someone out there who's actually done it.

speeedracerr
01-12-2011, 3:33 AM
I have a Umarex Colt M4 .22LR. I bought a Magpul CTR Commercial stock for it, and when I put it on, it was looser than the Umarex stock.

Has anyone tried to put a Milspec stock on this gun to see if it is a Milspec size buffer tube?

I have already looked at the threads at the front end of the tube, and it does not appear to be Milspec.

Don't respond with smart***** comments like, "why don't you measure the tube", because sorry, I dont have a tool that will measure the difference between a 1.15" and 1.17" tube. I want to hear from someone who actually put a Milspec stock on this gun and knows that it will fit. I don't want to order a Milspec tube if it's not going to work, and the commercial tubes are too loose for my preference.

It's Milspec... I have a Magpul MOE on mines ;)

http://i56.photobucket.com/albums/g181/speeedracerr/calgunsm4.jpg

lewisracing
01-12-2011, 6:52 AM
It's Milspec... I have a Magpul MOE on mines ;)

http://i56.photobucket.com/albums/g181/speeedracerr/calgunsm4.jpg

Thanks speedracer, nice gun. Looks like i'll get the milspec moe too.

lewisracing
01-19-2011, 7:21 PM
Ok, so it is Milspec afterall and i love my new MOE:

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs888.ash1/179640_1669622113568_1627824173_1483247_1178227_n. jpg

speeedracerr
01-19-2011, 9:53 PM
Ok, so it is Milspec afterall and i love my new MOE:

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs888.ash1/179640_1669622113568_1627824173_1483247_1178227_n. jpg

SWEET!!! :D Great Job Lewisracing ;) I like it!

Mamluke
01-22-2011, 1:12 PM
Hi guys,

I have the Umarex Colt 15-22 M4.

Can I remove the buffer tube to change the end plate into one that will accomodate a swivel sling? I removed the castle nut but was unable to dislodge the buffer tube and I was wondering if its in a fixed position due to Ca. state laws?

Any feedback and help will be greatly appreciated,
Thanks!!!

lewisracing
01-22-2011, 9:27 PM
Hi guys,

I have the Umarex Colt 15-22 M4.

Can I remove the buffer tube to change the end plate into one that will accomodate a swivel sling? I removed the castle nut but was unable to dislodge the buffer tube and I was wondering if its in a fixed position due to Ca. state laws?

Any feedback and help will be greatly appreciated,
Thanks!!!

Yes you can, it was easy but you need a really long allen wrench interted into the end of the buffer tube after you take the end plate off.

I installed a sling plate on mine and it was fine.

Mamluke
01-24-2011, 2:17 PM
Yes you can, it was easy but you need a really long allen wrench interted into the end of the buffer tube after you take the end plate off.

I installed a sling plate on mine and it was fine.

Thanks, I will give it a try later; so use an Allen wrench on the far end of the tube and go counter clockwise to unscrew? I hate to apply too much force and damage the darn thing...:helpsmilie:

lewisracing
01-24-2011, 2:59 PM
Thanks, I will give it a try later; so use an Allen wrench on the far end of the tube and go counter clockwise to unscrew? I hate to apply too much force and damage the darn thing...:helpsmilie:

If you happen to be in the LA area and in particular near the south bay, you can bring it to me and I will show you how.

But if not, here is what I recall from memory:

1. Print manual page 26 from here http://www.colt22rimfire.com/uploads/pdfs/Manual-Colt-22-TacticalRimfire.pdf

2. Remove the buttstock

3. Remove the end cap screw, item #20 on diagram and end cap, item #21

4. Loosen the castle nut, item #16, with a spanner wrench for AR15

5. Insert a really long allen wrench (sorry, I foget which size, use flashlight to see inside) into the end of the tube and unscrew the allen bolt, item #17 on diagram.

Yes, counterclockwise like any other bolt, just realize that they used red locktite on it from the factory and it is a pain to remove. It will make a squeaking noise when you remove it (sounds like maybe something is breaking), but just go slowly and after a few turns, it will get much looser.

Install is reverse of removal, use blue (weaker) locktite on the allen thread... no need to use red (stronger). in my opinion.

Mamluke
01-24-2011, 5:58 PM
If you happen to be in the LA area and in particular near the south bay, you can bring it to me and I will show you how.

But if not, here is what I recall from memory:

1. Print manual page 26 from here http://www.colt22rimfire.com/uploads/pdfs/Manual-Colt-22-TacticalRimfire.pdf

2. Remove the buttstock

3. Remove the end cap screw, item #20 on diagram and end cap, item #21

4. Loosen the castle nut, item #16, with a spanner wrench for AR15

5. Insert a really long allen wrench (sorry, I foget which size, use flashlight to see inside) into the end of the tube and unscrew the allen bolt, item #17 on diagram.

Yes, counterclockwise like any other bolt, just realize that they used red locktite on it from the factory and it is a pain to remove. It will make a squeaking noise when you remove it (sounds like maybe something is breaking), but just go slowly and after a few turns, it will get much looser.

Install is reverse of removal, use blue (weaker) locktite on the allen thread... no need to use red (stronger). in my opinion.

Thanks so much for helping out, I live too far south; your instructions could'nt be simpler though! I will try the Allen wrench that came with the rifle for the spring load adjustment and see if that will work.

Thanks again.

lewisracing
01-24-2011, 10:20 PM
Thanks so much for helping out, I live too far south; your instructions could'nt be simpler though! I will try the Allen wrench that came with the rifle for the spring load adjustment and see if that will work.

Thanks again.

No problem... the wrench does NOT come with the rifle, you need a longer wrench from an auto parts store... I think a #6 is what I used and it was at least 4" long and barely worked. It is really deep in there, most regular wrenches will not work.

Mamluke
01-25-2011, 8:25 AM
No problem... the wrench does NOT come with the rifle, you need a longer wrench from an auto parts store... I think a #6 is what I used and it was at least 4" long and barely worked. It is really deep in there, most regular wrenches will not work.

Yep, the one that came with the rifle is too short, luckily; I had a an allen socket and I used an extension with my wrench and it worked like a charm! I'm so excited!! Glad I had these tools, which I use on my KTM dirt bike, and now they work on the rifle too!!!

I will post pics tomorrow of the finished work, many thanks again... :D

Mamluke
01-26-2011, 9:52 AM
Trying to see how photos will post and appear without an attachment type...

http://i6.photobucket.com/albums/y212/LavaBull/sn6.jpg

http://i6.photobucket.com/albums/y212/LavaBull/HBcreek3.jpg

My SIG Mosquito kept jamming, it was the ammo/spring combination... with CCI minimags and the proper spring worked like a sweing machine..

http://i6.photobucket.com/albums/y212/LavaBull/Cuddeback%20Lake/Sig6.jpg

lewisracing
01-26-2011, 10:03 AM
Nice pics! Glad it worked out!!! I also have a mosquito, but what spring do you use with your mini mags? I am having all kinds of jamming issues, but still breaking it in.

I know there are tons of posts on this topic, but I just want to know what spring worked for you.

Mamluke
01-26-2011, 10:59 AM
Nice pics! Glad it worked out!!! I also have a mosquito, but what spring do you use with your mini mags? I am having all kinds of jamming issues, but still breaking it in.

I know there are tons of posts on this topic, but I just want to know what spring worked for you.

Hi again,

The Mosquito came loaded with the lighter (white) spring, and the heavier forged (black) spring was supplied in the box. The owner's manual states that you should use the heavier forged spring for High Velocity loads; but there was an additional note in the box recommending just the opposite! Confusing eh?!...

The note also recommended CCI minimags for best results. And so despite the confusion, I decided to use the lighter spring (the one that came already loaded in the pistol) and have fired over 500 rounds of CCI minimags 36 Grain without a single jam... So I'm very pleased with the operation of the Mosquito so far...

I will post pics of the Ar15-22 with the new plate later now that I now what to do!
Here are some more jamming pics of the Mosquito ...

http://i6.photobucket.com/albums/y212/LavaBull/Cuddeback%20Lake/Sig5.jpg

http://i6.photobucket.com/albums/y212/LavaBull/Cuddeback%20Lake/Sig8.jpg...:D

Mamluke
01-26-2011, 6:33 PM
Here's some pics of the new installation of the end plate,,,

http://i6.photobucket.com/albums/y212/LavaBull/ar3.jpg

http://i6.photobucket.com/albums/y212/LavaBull/ar2.jpg

http://i6.photobucket.com/albums/y212/LavaBull/ar4.jpg

Thanks so much for the help and feedback...:D

lewisracing
01-26-2011, 9:17 PM
VERY nice pics! Thats a huge scope for a 22 (and high off the deck), but whatever works for you is what you should do.

DarthChowder
01-20-2013, 9:06 PM
Quick question for you guys about the Colt AR-15 22. I have the "M16 SPR" version. Comes with the solid stock. I want to replace it with a Magpul MOE... but my gun does not have a receiver extension. I cannot install a stock like that without one. Where can I get a receiver extension that will fit this gun? I don't want to waste money. Thinking about calling Colt themselves and see if they can sell me one. Any ideas where to go? I would love it if some guru here had a web-link to one!

Hope you all can help me out.

lewisracing
01-23-2013, 10:26 AM
If I recall corectly, the Colt M4 .22 has a special buffer tube that is not the same as a regular AR15, so I doubt you can use any buffer tube. You probably need to order that part from Colt/Umarex.

dirtracer27x
01-23-2013, 2:26 PM
colt cant help you you need to call umarex,heres mine :)
http://i91.photobucket.com/albums/k318/mccraryfloors/IMG_1477.jpg

925topher
02-28-2013, 1:17 AM
Dirtracer, how did you install the aftermarket pistol grip? I want to run Magpul MOE fore end and grip, but the grip is not mil-spec on the stock rifle.

speeedracerr
02-28-2013, 1:30 AM
Dirtracer, how did you install the aftermarket pistol grip? I want to run Magpul MOE fore end and grip, but the grip is not mil-spec on the stock rifle.

You will need to modify the grip a little bit... When taking off the stock Umarex M16 grips, look at the hole pattern and you'll have to do the same on the Magpul MOE as you can see which I've done to attach my MOE on post #4

925topher
03-01-2013, 10:12 PM
Ah ty.

md2bpo
05-13-2013, 9:03 AM
good info guys - thanks

md2bpo
05-14-2013, 8:37 AM
colt cant help you you need to call umarex,heres mine :)
http://i91.photobucket.com/albums/k318/mccraryfloors/IMG_1477.jpg

Nice set up. How'd you get that trigger guard done? Modification or set product?

sjg1966
05-14-2013, 2:04 PM
I put the MCTAR-13 sling plate adapter on my Umarex hk416-22. No need to take the tube off with that adapter.

http://www.midwestindustriesinc.com/index.cfm?fuseaction=category.display&category_ID=97

army4life
05-14-2013, 9:37 PM
It's milspec but you can always replace the the "Buffer" tube with an airsoft AEG "buffer" tube if you want.