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AR15 style .300 Fireball/Whisper set up

Lightly used Olympic arms barrel
16" M4 cut 1:8 twist, threaded 1/2x28
carbine length gas system
A2 style FSB
250+ rounds of whisper brass some (about half of it has been primed)

.300 whisper uses standard 5.56 bolt carrier group.

Asking $225 or a good trade.

FTF north portland
 
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What's the availability on the 300 whisper ammo?

Does it take regular AR mags?

yes it takes a standard AR mags and everything else... the only difference would be in the barrel and muzzle device.

.300 is an ammo usually hand loaded, but it can be found online and at gunshows.
 

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