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300 AAC / Blackout upper receiver for your Ar15. Great choice for your 300 blackout build.
16" 1:8 twist barrel.
10" Free float quad rail.
7075-t6 Aluminum Receiver
M4 Feed Ramps
5/8-24 Barrel threads.
Carbine Gas
Enlarged Gas port
.750 Barrel diameter
A2 Flash Hider
Forward assist & dust cover.
- Item #: 300upper16
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