AR-15 Question

[Flattop5]

I have an AR-15 .223 with a Smith and Wesson M&P lower receiver and a Bravo Company upper receiver.

Question: how long can this AR-15 remain cocked before the "recoil" spring (i.e., buffer spring) goes weak?

Thanks in advance.




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[SW CQB 45]

Compare the length to a new one.

Questionable.....replace.

If your bolt is running to fast because of weak buffer spring, I have seen trigger pins break.

 

[Arik]

A long time. Springs wear out from use

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[CATI1835]

Not sure what the gun being "cocked" has to do with the "recoil" spring. The buffer spring is only compresses when the weapon is fired. It has nothing to do with the gun being "cocked".

 

[Arik]

Not sure what the gun being "cocked" has to do with the "recoil" spring. The buffer spring is only compresses when the weapon is fired. It has nothing to do with the gun being "cocked".

That's what I was thinking but I thought I just misunderstood

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[Flattop5]

Not sure what the gun being "cocked" has to do with the "recoil" spring. The buffer spring is only compresses when the weapon is fired. It has nothing to do with the gun being "cocked".

Oh, okay. I did not know that. I thought the buffer spring controlled the cocking.

Which spring controls the cocking? That is, which spring holds it in the cocked position? And is THAT spring easily worn out?


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[Hrbster]

I think you may be referring to the hammer spring.

 

[Protocall_Design]

Most springs wear out due to number of cycles rather than static compression.

 

[speedyquad]

When you say cocked, and mention the buffer spring, do you mean charged with the charging handle?

If so, do you think when you pull the charging handle back, you are pulling the bolt back and it remains in the rearward position?

I'm asking to clarify, so we can give the correct answer.

 

[Flattop5]

When you say cocked, and mention the buffer spring, do you mean charged with the charging handle?

If so, do you think when you pull the charging handle back, you are pulling the bolt back and it remains in the rearward position?

I'm asking to clarify, so we can give the correct answer.

Yes, cocked with the charging handle and ready to fire.



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[vortex360]

A long time. Springs wear out from use

Sent from my XT1650 using Tapatalk

And don't forget heat kills springs too.

 

[CATI1835]

Yes, cocked with the charging handle and ready to fire.



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The only spring under any tension in this condition (ready to fire) is the hammer spring. When you release the bolt, the bolt travels forward to the firing position The buffer spring was relieved when you released the bolt hold open. Again, the only spring under tension is the hammer spring. The hammer spring should last a long time.
There are many good videos on You Tube related to AR lower builds. You might take a look at some.

 

[sbrmike]

In the Army the M16's were stored on Semi with the trigger pulled, i.e. uncocked. If that was good enough for them it is good enough for me. I store all my guns bolts closed and hammer down.

 

[speedyquad]

The only spring under any tension in this condition (ready to fire) is the hammer spring. When you release the bolt, the bolt travels forward to the firing position The buffer spring was relieved when you released the bolt hold open. Again, the only spring under tension is the hammer spring. The hammer spring should last a long time.
There are many good videos on You Tube related to AR lower builds. You might take a look at some.

Thank you, this is where I was going to go if he answered the way that he did.