Ar10 BUFFER

[bodiebill]

are there different springs for the various weight buffers?

[naz]

Yes there are different springs. Check out sprinco

Respectfully, if it’s your first large frame AR build, consider choosing a matched set, with complete factory assembled upper, and the buffer weight and action spring suggested by the manufacturer of the upper.

One idea is Larue ultimate upper kit, which is basically a large frame AR completion kit of everything you need minus the lower receiver (needs to be sr25 pattern)

Good luck!