Preventative replacement

[currahee]

Is there a thread on when to replace various parts?

I have replaced a couple of parts over the years- mainly cheap extractors that broke, replaced by BCM, and I always keep a supply of some various parts on hand. (to include a bolt, another complete BCG, extractors, gas rings, cam pin, all the retaining pins and firing pins.) But, I have seen a couple of things in threads recently that got me thinking.

A couple of my ARs have over 5k rounds. I have never done anything but clean and inspect. I am planning on going though them all and making sure they have BCM upgraded extractors and replacing the gas rings. I'm also going to start keeping a more accurate record of what has been done-shooting and maintainance, so I'm not at this "wondering point" again. Is there anything else I should consider replacing? Someone mentioned the ejector & buffer spring in another thread.

I have looked through all the posted threads and can't find any ideas.

[markm]

Mostly Action springs... Suggested every 5k... but I probably go longer than that.

Iraqgunz has been talking about Ejector springs in the bolt lately... I must admit.. I don't keep a close enough eye on those.

Other than that.... a new complete Bolt on a gun that gets hard use every 10k or so.

[Guns-up.50]

there is a sticky on maintenance has some info about replacement parts and rnd count

[sammage]

there is a sticky on maintenance has some info about replacement parts and rnd count

And a damn good sticky it is. https://www.m4carbine.net/showthread.php?t=61505

[Iraqgunz]

Buffer springs are measured and that's how you determine when to replace them. The acceptable measurements have been posted numerous times here.

When I check extractor and ejector springs my rule is that if they start to feel "mushy" then I repalce them. I have a bolt that is running the original extractor spring and it has about 10k rounds on it.

Gas rings can be tested and that method is also outlined several times here.

[currahee]

And a damn good sticky it is. https://www.m4carbine.net/showthread.php?t=61505

I re-read that (I had just looked at the beginning and didn't scroll down to see the parts replacement part) -Thanks

[308sako]

I am a believer in the CS or chrome silicon springs like David Tubbs flatwire springs for the buffer and they are also available for the extractor and ejector, think I goot them through Brownells'. They have a cycle life of 500,000 motions, so how's that for a do it and forget it upgrade.

That's my 2 cents as has followed my dollars.

[sinlessorrow]

I am a believer in the CS or chrome silicon springs like David Tubbs flatwire springs for the buffer and they are also available for the extractor and ejector, think I goot them through Brownells'. They have a cycle life of 500,000 motions, so how's that for a do it and forget it upgrade.

That's my 2 cents as has followed my dollars.

Part in red is pretty doubtful. As to the OP, IG answered everything.

[Dravur]

is there a manufacturer of springs that may be better than others? or is a spring a spring and they are about the same?

[markm]

is there a manufacturer of springs that may be better than others? or is a spring a spring and they are about the same?

I get real COLT springs from Brownells. I keep a few of the action springs on hand at all times.

CS springs might have a good application somewhere... but it isn't in any of my ARs.