Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login
Arrow Left Previous Page
Page / 3
Posted: 1/1/2006 1:02:02 PM EDT
Link Posted: 1/1/2006 1:07:58 PM EDT
You just gave me a good idea.

I happen to have an new and unused CMT spring. I think I'll mark the inside of my toolbox with the length of that spring. When compression reaches 1 1/2 inches on any of my springs, time to upgrade.

Think 1 1/2 is a good number?
Link Posted: 1/1/2006 1:16:05 PM EDT
Link Posted: 1/1/2006 1:32:38 PM EDT
how come the new CMT is shorter than the new ISMI ? design difference ?
Link Posted: 1/1/2006 1:38:27 PM EDT
The last time I looked at a Army TM I beleive the minimum lenght is 11 3/4" with the max at 13 1/2".SJR556.
Link Posted: 1/1/2006 1:39:31 PM EDT
Link Posted: 1/1/2006 1:45:53 PM EDT
Couldn't you just strech them back out?

jj


Link Posted: 1/1/2006 1:49:04 PM EDT
Link Posted: 1/1/2006 1:50:43 PM EDT
Link Posted: 1/1/2006 6:41:06 PM EDT
Owning only a lonely RRA Elite CAR-4 (mid-length), I have to ask if all buffer springs are the same length? It seems that the buffer tubes are different lengths between a fixed stock rifle and the collapsible stocks and that would seem to indicate they would use different length springs.
???
Link Posted: 1/1/2006 7:02:29 PM EDT
Good info.
Link Posted: 1/1/2006 7:24:38 PM EDT
Two of them are short a few coils.
Link Posted: 1/1/2006 9:45:32 PM EDT
C4,
I should have noted that the minimum 11 3/4" with the max at 13 1/2"is for rifle stocks.Looking back at your first post it seems that you are referring to carbine springs.They should be 10 1/16" to 11 1/4".These are the specs for the military.I do have a carbine spring made of music wire that is much longer than the above specs that works just fine.Looking at the pics you posted your new spring looks similar to the music wire spring I have.The wire looks a little thinner and it may have more coils but they are supposed to last a lot longer.SJR556.
Link Posted: 1/1/2006 9:55:16 PM EDT
Grant,

Could you try some last round bolt hold open drills with these springs? Maybe using some non-M193 rounds like American Eagle, etc. to see if everything still functions 100%? I have 2 Wolff buffer springs that I would not trust because they will not consistently hold open on the last round and gave me some ss problems.
Link Posted: 1/1/2006 10:06:56 PM EDT
Was that CMT removed from a gun or from it's packaging? It's my understanding that a brand new spring is longer and will take a set after it's been installed. Not from being worn out, just getting to it's normal working length. When it's worn, it will be even shorter, more like the one on the left.
Link Posted: 1/2/2006 6:13:29 AM EDT
Link Posted: 1/2/2006 6:19:29 AM EDT
Link Posted: 1/2/2006 6:20:58 AM EDT
[Last Edit: 1/2/2006 6:25:31 AM EDT by C4iGrant]
Link Posted: 1/2/2006 6:23:51 AM EDT
Link Posted: 1/2/2006 7:33:07 AM EDT
Springs are something that are often overlooked by people, and when springs are brought up, its almost always just the extractor spring that is talked about here.

Thanks for the info, and keep us posted.
Link Posted: 1/2/2006 7:45:07 AM EDT
Grant , do you have these new recoil springs on your website yet?
Link Posted: 1/2/2006 7:46:18 AM EDT
[Last Edit: 1/2/2006 7:48:34 AM EDT by C4iGrant]
Link Posted: 1/2/2006 7:47:25 AM EDT
Link Posted: 1/2/2006 7:58:56 AM EDT
Grant,

Are the ISMI carbine buffer springs considered to be extra power springs?

Link Posted: 1/2/2006 8:01:45 AM EDT
Link Posted: 1/2/2006 8:32:59 AM EDT

Originally Posted By C4iGrant:

Originally Posted By sovereign:
Grant,

Could you try some last round bolt hold open drills with these springs? Maybe using some non-M193 rounds like American Eagle, etc. to see if everything still functions 100%? I have 2 Wolff buffer springs that I would not trust because they will not consistently hold open on the last round and gave me some ss problems.



I did already. I used UMC 55gr and M855 and both ran perfectly. I am also running a M16 Carrier and an H3 buffer.

Another thought is that you might have a bad gas seal (not getting enough pressure).



C4



Many here, including SMGLee, have had problems with the Wolff springs where none existed before. Glad to here that the ISMI are not a "+10% design" and look forward to reviews by others...

Link Posted: 1/2/2006 8:35:59 AM EDT
Thanks Grant. You have an email from me.
Link Posted: 1/2/2006 9:43:43 AM EDT

Originally Posted By C4iGrant:

Originally Posted By SRTM4:
Grant , do you have these new recoil springs on your website yet?



The ISMI springs are not on my web site yet. You can e-mail me for ordering instructions. sales@gandrtactical.com


C4



Thanks Grant. I appreciate the help with my issue and the great service.
Its good to have vendors like this on Arfcom to deal with.
Link Posted: 1/2/2006 10:00:41 AM EDT
Grant,

was your rifle recoiling unacceptably hard or malfunctioning before you changed the buffer spring?

Link Posted: 1/2/2006 12:08:18 PM EDT
Check out Tubbs site for a good tutorial on springs. Chrome silicon is the way to go, they don't take a set like music wire springs.
Link Posted: 1/2/2006 12:47:49 PM EDT
Link Posted: 1/2/2006 12:48:41 PM EDT
Link Posted: 1/2/2006 12:51:11 PM EDT
Check out my previous thread. I agree with Grant. The ISMI springs are the way to go.

http://www.ar15.com/forums/topic.html?b=3&f=118&t=248898
Link Posted: 1/2/2006 1:01:25 PM EDT
[Last Edit: 1/2/2006 1:03:22 PM EDT by C4iGrant]
Link Posted: 1/2/2006 1:04:48 PM EDT
Thanks
Link Posted: 1/2/2006 2:13:42 PM EDT

Originally Posted By C4iGrant:

Originally Posted By ian187:
Grant,

was your rifle recoiling unacceptably hard or malfunctioning before you changed the buffer spring?




Yes, I had some issues with it, but wasn't really sure what the problem was.

Recoil from a 5.56 is NEVER a problem, but I did notice a change.


C4



What were the issues?

Link Posted: 1/2/2006 2:15:26 PM EDT
Ok, I'm trying sort this all out.

Has anybody used these springs with an Enendine or MGI buffer? What is the difference in this spring vs the 2X spring that MGI has?

I'm not sure which way to go once I upgrade my standard carbine spring/buffer with a new buffer and ????spring. There are so many choices and I want to get it 'right' the first time.

Thanks,
Link Posted: 1/2/2006 2:24:37 PM EDT
Link Posted: 1/2/2006 2:25:33 PM EDT
Link Posted: 1/2/2006 4:10:02 PM EDT
[Last Edit: 1/2/2006 4:10:58 PM EDT by SIGNAL4L]
I ran a .45 acp upper and a standard buffer spring for a few hundred rounds. It defenitely took a set. The pistol caliber uppers seem to beat up the springs more than 5.56/.223. The new ISMI buffer springs are flat wire. I have the older round coil type and it works great. I would spend the money and get one of these from Grant if you shoot much pistol cal
Link Posted: 1/2/2006 5:31:17 PM EDT
So do you sell them?

If they lower recoil and last longer and also have more pressure for more reliable stripping of rounds from the mag it's a winwinwin. Why not.
Link Posted: 1/2/2006 5:45:26 PM EDT
Link Posted: 1/2/2006 6:56:11 PM EDT

Originally Posted By Green0:

If they lower recoil and last longer and also have more pressure for more reliable stripping of rounds from the mag it's a winwinwin. Why not.



The only potential "why not" is, if they are anything like the Wolff springs, they may cause a setup that formerly functioned perfectly with all types of ammo to start to intermittently short stroke/stovepipe/fail to lock back on last round, etc. But, as Grant has said, they are functioning fine for him, so until there are more results from others...
Link Posted: 1/2/2006 7:01:01 PM EDT
I remember reading about a flat-wound ISMI CAR spring. Apparently, this one isn;t it. Anyone know anything about that one?
Link Posted: 1/2/2006 9:59:52 PM EDT
Superior Shooting Systems markets the flat wire AR buffer springs. While I don't know for sure I'm pretty sure that SSS springs are made by ISMI. ISMI is a premium manufacture of gun springs and the use almost no BS marketing which is refreshing.

One thing to remember when you put a new spring in is that the spring will take an initial set reducing it's free length, this is 100% normal. If you have any significant reduction in free length after the initial set then look into replacing the spring. A better way to determine the state of a coil spring is to measure the compressed force of the spring. You could make a fixture out of a A2 buffer tube by drilling a hole in the butt side of the tube to the point it will capture the spring but that's about it and making a plug that has a wire or cable attached to the center of the plug. Put the spring into the tube and then put the cable down the center of the spring and out the hole. Attach a fish scale to the cable and compress the spring to a repeatable length (dremeling a slot in the side of the buffer tube and pulling the spring tight until you see the plug would work) and recored the weight.

Never pull on a coil spring it will just make it fail sooner.

All coil springs are wound in their annealed state and then heat treated, otherwise you couldn't wind them very well .
Link Posted: 1/3/2006 5:50:31 AM EDT
Link Posted: 1/3/2006 5:52:27 AM EDT
Link Posted: 1/3/2006 8:03:34 AM EDT

Originally Posted By C4iGrant:

Originally Posted By sovereign:

Originally Posted By Green0:

If they lower recoil and last longer and also have more pressure for more reliable stripping of rounds from the mag it's a winwinwin. Why not.



The only potential "why not" is, if they are anything like the Wolff springs, they may cause a setup that formerly functioned perfectly with all types of ammo to start to intermittently short stroke/stovepipe/fail to lock back on last round, etc. But, as Grant has said, they are functioning fine for him, so until there are more results from others...



ISMI springs are not 10% extra power like the Woff Springs (so you shouldn't see the same issues that Wolff springs produce). They are simply better made springs using the best materials available.


C4



Sounds great. Looking forward to more impressions...
Link Posted: 1/3/2006 8:32:53 AM EDT
How much $$$ are these?
Link Posted: 1/3/2006 8:48:13 AM EDT
Tag for future reference
Link Posted: 1/3/2006 10:26:59 AM EDT
Arrow Left Previous Page
Page / 3
Top Top