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Ok its a flip switch. shown here. MATECH AR15/M4 BUIS Sight Flip-Up 0-600m fastest adjustable sight I've ever seen, if I had been allowed to BZO it I might even trust it (don't ask really) so its 200 300 line 400 450 500 550 600 whatst the line for? while I"m at it, are the measurements for an A4 or an M4 barrel?
Just idle curiousity here. I figure the line is CQB so I leave it on that but figured someone might know for sure.
Just idle curiousity here. I figure the line is CQB so I leave it on that but figured someone might know for sure.