Help: buffer, spring for fixed stock

[workinwifdakids]

I'm building a precision AR15 for use with heavier 5.56/.223 rounds.

Recently, I acquired a fixed stock with buffer and spring (all used). My brother seems to think the manufacturer was Colt, but I am unsure if it's A1 or A2 (if that matters). Anyway, if I'm going to replace the buffer and/or spring, I'd like to do that now. If I should replace them, can you recommend some good products?

[antarius]

You will get a thousand answers on this saying why a heavier buffer is better, or why it's not, or what better to spend your money on, etc. etc. etc.

My two cents? Slap on the stock, fire it, and see if you have any issues with it. If you don't have any problems, save the money and buy an extra magazine or something.

I'd be really, really, really surprised if you have problems with any buffer/spring setup that you currently have.

I have two AR's with standard buffers/springs, for what it's worth.

[RECCE556]

Buffer springs compress with use so if you buy a used stock with a used buffer/spring and you don't know the round count on the spring, I would say get a new spring. My recommendation is use the factory A2 buffer and get a Brownells Chrome Silicon A2 buffer spring (Part No. 078-101-113)

What antarius is talking about (heavier buffers and such) only really apply to carbine gas systems with collapsible stocks....and since you said you're building a precision setup, I'm assuming you're using a rifle length gas system.

[Sgt Raven]

Buffer springs compress with use so if you buy a used stock with a used buffer/spring and you don't know the round count on the spring, I would say get a new spring. My recommendation is use the factory A2 buffer and get a Brownells Chrome Silicon A2 buffer spring (Part No. 078-101-113)

What antarius is talking about (heavier buffers and such) only really apply to carbine gas systems with collapsible stocks....and since you said you're building a precision setup, I'm assuming you're using a rifle length gas system.

Measure the free length of your current 'rifle' buffer spring and post it. Then we can give an opinion on replacing it.

A2's use the same buffer system as A1's, the difference is (1.)the stock, (2.)a 5/8" spacer, (3.)a longer upper buttplate screw.