Looking down the rear iron sight of an M15A4 Carbine.
English: Civilian AR-15 target sights have an aperture between 1 to 1.15 mm (0.040-0.045"). The aperture on AR-15 military sights have a day aperture of approximately 1.8 mm (0.070"), and also a night setting with a larger 5 mm aperture (0.200"), and as such the military sight is not stricly a diopter sight.
Norsk bokmål: Et dioptersikte på en Armalite AR-15. Sivile AR-15 matchsikter har lysåpning mellom 1 til 1.15 mm åpning (0.040-0.045 tommer). Baksiktet på militære utgaver har et dagsikte med lysåpning på ca. 1,8 mm (.070"), samt nattsikte med større åpning på 5 mm (0,200"), og de militære siktene er således strengt tatt ikke dioptersikter.
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2005-08-27 06:44 Kinkify 320×240×8 (53900 bytes) Looking down the rear iron sight of an M15A4 Carbine. {{PD}}
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{{Information |Description=Looking down the rear iron sight of an M15A4 Carbine. |Source=Originally from [http://en.wikipedia.org en.wikipedia]; description page is/was [http://en.wikipedia.org/w/index.php?title=Image%3ARear_iron_sight_m15a4carbine.jpg he