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What's the difference between Mil-spec and commercial? Would Rock River Arms tubes be mil-spec or commercial? — 1 Answer

by constable333, from TX, United States Asked on November 29, 2021

Name BlackHawk Knoxx Axiom A-Frame Carbine Stocks (3.5)
$62.45 $44.35 Save 29%
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Answered by Ethan, Gear Expert, from IL, United States, on March 28, 2022

At the buttstock end, the commercial buffer tube is .02” wider than the mil-specific buffer tube—1.168" vs. 1.148" diameter respectively. But at the receiver end, the mil-spec tube diameters are .015” wider than commercial spec tubes at 1.185” (including the height of the threads). I would recommend reaching out to Rock River Arms to see what exact buffer tube came on your specific rifle/pistol.

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