[ARCHIVED THREAD] - Failure to extract

Posted: 6/14/2007 9:33:26 AM EDT

Randall, you said over on the 6.5 forum: The cause of failure-to-extracts is usually an over-gassed operating system that's trying to extract while the case is still obturated in the chamber.
Increasing the extractor spring strength is just a band-aid.
The solution is a heavier buffer or even better is less gas into the gas system via an adjustable gas tube or gas block.
This will allow the case to shrink back down before extraction occurs.

Wouldn't a Tubbs carrier weight help in this situation too? You and I discussed that once so I brought it up here so others can benefit from it.

Joe

Posted: 6/14/2007 11:06:40 AM EDT

[#1]

It's the total weight of the carrier and buffer train that matters.
An M16 carrier is 0.3 oz heavier than a regular semi-auto carrier.
I don't know what the tubb weights add.
Here are common buffer weights:

Posted: 6/14/2007 11:23:08 AM EDT

[#2]

Quoted:
It's the total weight of the carrier and buffer train that matters.
An M16 carrier is 0.3 oz heavier than a regular semi-auto carrier.
I don't know what the tubb weights add.
Here are common buffer weights:

ar15barrels.com/tech/buffer-construction.jpg

Tubbs weight weighs 4.05 ounces, which would be about 1771.875 grs.

Joe

Posted: 6/14/2007 11:25:48 AM EDT

[#3]

Quoted:
Tubbs weight weighs 4.05 ounces, which would be about 1771.875 grs.

I thought there were different weights in the "system"

Posted: 6/14/2007 12:16:40 PM EDT

[#4]

Quoted:

Quoted:
Tubbs weight weighs 4.05 ounces, which would be about 1771.875 grs.

I thought there were different weights in the "system"

There is, that is the heaviest combination with the tungsten insert. Remember I made mine and it has a lead insert and made a dramatic difference on my Colt AR15

[ARCHIVED THREAD] - Failure to extract

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[ARCHIVED THREAD] - Failure to extract

[ARCHIVED THREAD] - Failure to extract