Built this a year ago. It's your standard CavArms MkII lower (buffer and grease gun mag conversion) with an SRT suppressed Oly Arms Upper.
I'm using a cheap POS scope because happens to have notches every 5 MOA and the bullet drops 10 inches at 100 yards. I want to get an EoTech, but I cant think of any way to do the holdover for longer distance shots.
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