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M16a1 and a2 front sight pin removal/adjustment tool - Small AR15 Parts at GunBroker.com : 999258604
Does a fixed A2 style front sight post tend to interfere with scopes or other optics, magnified or not? - Quora
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Amazon.com : SNIPER Standard Front Sight with A2 Sight Post, Black : Gun Holsters : Sports & Outdoors
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