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26" McGowen barreled 6mm Grendel upper
#37
The thought behind them was to be used with a suppressor and not have the gas in the face.

IIRC there was initial gas reduction - no bleed, then you get into the bleed off section.
Sticks

Catchy sig line here.
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Messages In This Thread
26" McGowen barreled 6mm Grendel upper - by Kilco - 03-28-2018, 04:49 AM
26" McGowen barreled 6mm Grendel upper - by bj139 - 03-28-2018, 03:25 PM
26" McGowen barreled 6mm Grendel upper - by Kilco - 04-01-2018, 04:39 AM
26" McGowen barreled 6mm Grendel upper - by bj139 - 04-09-2018, 01:01 PM
26" McGowen barreled 6mm Grendel upper - by bj139 - 04-10-2018, 02:15 PM
26" McGowen barreled 6mm Grendel upper - by bj139 - 04-11-2018, 12:30 PM
26" McGowen barreled 6mm Grendel upper - by bj139 - 04-11-2018, 02:41 PM
26" McGowen barreled 6mm Grendel upper - by Sticks - 04-28-2018, 03:32 PM

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