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A.R.M.S., Inc. ARMS Low Profile Rear Sight Black #40LL

Rugged aluminum and steel flip-up rear sight regulates properly with A2-height front sights and can be co-witnessed through an optic. Dual apertures are calibrated for close- and mid-range targets, simply aim through both or fold the first one down and use the second aperture. Easily mounts to a Picatinny receiver rail; locknut is retained by a safety wire, so you can’t lose it. Non-snagging lever instantly releases the spring-loaded sight into the ready position. #40L Low Profile is calibrated for 250 and 300 meter combat ranges, with windage adjustable in ¾ MOA increments per click. NSN #1005-01-575-3508.

Specifications:
- Type: Sight
- Make: AR-15
- Style: Adjustable, Flip-Up
- Color: Matte Black
- Apertures: Steel, Matte Black
- Hardware - Stainless steel, matte black
- Base: Aluminum, hardcoat anodized, matte black
- 23/16" (5.6cm) long, 13/8" (3.5cm) wide
- #40L
- 5/8" (1.6cm) high from flattop (folded),
- 15/8" (4.1cm) tall (deployed)