I'm in the process of purchasing an SBR upper for my LE6920 lower. Eventually I intend to use the SBR exclusively as a suppressed weapon. As a result I am considering purchasing THIS upper.
My question are:
1. Will need to make any changes to my LE6920 lower or will the weapon function properly "as is"?
2. Is this a quality upper to run suppressed?
3. Can I only use a 300BLK suppressor on it?
4. Does anyone have any experience running this particular upper & any feedback?


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