AR15 VS AR10 / LR308

[Ronin6]

How do you ID Buffer Springs and Buffers, especial since the Buffer Tube is the same for both?

[FeuerFrei]

https://308ar.com/ar-10-308-ar-compatibility-reference-guide/

bookmark this for a solid reference.

http://www.biggerhammer.net/ar15/buffers/

[kcheung2]

For a 308AR,
the spring is 11 1/8" in the relaxed position,
the carbine (typical) buffer weight is 3.78 ounces
with a length of almost 2 1/2"

For a 556AR,
the spring is 9 3/4" in the relaxed position,
the carbine (typical) buffer weight is 3 ounces
with a length of 3 1/4"

Both are for carbine buffer tube, which is the most common on both types and also what I happen to have laying around. Obviously there are heavier buffer weights, but the weights I have are what came with the rifles and they work fine.

[Ronin6]

A2 Stock, 6.5 CM Aero M5

[freonr22]

Where are Randall and dieselpower, in the epic, but lost thread about commercial vs milspec stocks? Ive searched for that thread, and cant find it