Description
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Will fit most .223 and M16 rifles. Complete adjustable elevation & windage. Designed to mount on top of gas blocks with Picatinny rails. Material: Aluminum Weight: 3.1 oz Pieces: 1 Rail Type: Picatinny/Weaver Length: 1.1 inch Width: 1.9 inch Height: 2.1 inch
ASIN: B008MPAC9E
So how does a flip front sight have a "dual aiming aperture" ? Also these are most likely for low profile gas blocks and too high for mounting on the Picatinny rail.