I have everything to build my m4 except 2 parts buffer and spring.... I have a mil spec size tube and stock, my question is will the following parts work:
https://www.rockriverarms.com/index....TOKEN=20424892
AR0072A 72 - Action spring, CAR $4.00
and
AR0107A 107 - Buffer assembly, CAR $11.00
Rock river doesnt list if these are mil spec or commercial or does it matter. I would think the spring and buffer need to be not commercial but mil spec size, but there doesnt seem to be any other options from RR.
Thanks for your input.
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