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Can I run a h buffer with a 556 and a 762 x39 upper? Will everything cycle properly? I may build a 450 bushmaster upper as well. — 2 Answers

by Mark, from MI, United States Asked on January 13, 2022

Name Aero Precision AR15 Carbine Buffer Kit (4.5)
$75.00 $67.99 Save $7.01
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Answered by Hunter, Gear Expert, from OH, United States, on January 18, 2022

It depends on a few things like barrel length, but I would recommend an H3 for the heavy calibers.

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Answered by Mark, member, from MI, United States, on January 18, 2022

Ty. I'm running a 16in 556 And a 16in 762 x 39 barrel on my uppers. The h buffer is going in a lower I'm assembling for a 1 and 7 twist 16 in wylde barrel carbine upper. I keep reading an h buffer has some advantages over a standard 3 oz buffer.

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