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Old 03-18-2014, 02:59 PM
macliver macliver is offline
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Default Buffer Tube/Spring/Buffer Inquiry

I picked up my M&P10 today and already had most of the mod parts ready to go so I started with replacing the buffer tube assembly with the Vltor A5 7 Position assembly. The tube isn't an issue as the specs and length are the same. However, it's apparent you cannot use the buffer for the Vltor system as it is too long. So my question is should it be okay to continue to use the stock carbine buffer and spring in the Vltor 7 Position tube? All seems to work fine with it, the bolt locks, etc. Should I consider running a heavier buffer in the system? Thanks in advance for any insight.

Mac
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Old 03-19-2014, 12:05 AM
copemech copemech is offline
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I do not understand why you would do this unless it is specific to their setup, but if the tubes are same length and made for 308 just put stock spring and carbine buffer in.

AR 15 tube is shorter by 3/4" or so as I recall in carbine length short(adjustable)

The 308 bolt carrier has to move a bit further than a .223 so a carbine standard .223 tube is too short for the .308 action to move.

Rifle length(fixed) tubes are another topic.

You can read other posts, but the gun should run ok with American brass standard ammo in the 150-180gr range I would think. Then you get into other issues when you deviate.

Last edited by copemech; 03-19-2014 at 12:09 AM.
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Old 03-19-2014, 08:37 AM
macliver macliver is offline
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Quote:
Originally Posted by copemech View Post
I do not understand why you would do this unless it is specific to their setup, but if the tubes are same length and made for 308 just put stock spring and carbine buffer in.

AR 15 tube is shorter by 3/4" or so as I recall in carbine length short(adjustable)

The 308 bolt carrier has to move a bit further than a .223 so a carbine standard .223 tube is too short for the .308 action to move.

Rifle length(fixed) tubes are another topic.

You can read other posts, but the gun should run ok with American brass standard ammo in the 150-180gr range I would think. Then you get into other issues when you deviate.
I do this because my LOP is LONG and the Vltor tube gives me an extra bit of length with the 7 positions and the Magpul ACS Stocks which I use are compatible with all seven positions from fully closed to extended.

I figured it out however. Called SW, I simply re-used the carbine buffer and spring that came in the rifle. I'll be listing the A5 buffer and spring for sale.

Does this make sense now? Hope i explained it correctly.

thanks,
mac
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Old 03-19-2014, 10:58 PM
copemech copemech is offline
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Quote:
Originally Posted by macliver View Post
I do this because my LOP is LONG and the Vltor tube gives me an extra bit of length with the 7 positions and the Magpul ACS Stocks which I use are compatible with all seven positions from fully closed to extended.

I figured it out however. Called SW, I simply re-used the carbine buffer and spring that came in the rifle. I'll be listing the A5 buffer and spring for sale.

Does this make sense now? Hope i explained it correctly.

thanks,
mac
Yes, perfect sense, and I tried to answer in my first sentence, then went on rambling about other stuff! Ha!

As far as buffers go, see just how you do using good ammo, lots of opinions and comments on here with the guns being pickey, some running fast, others slow. I am running an H2 at the mo. Keep us posted.
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