The NEW A.R.M.S.(R) #41(TM)-B-L SILHOUETTE(TM) Front Folding Sight solves the problem of trying to fold the well known triangle shape of the conventional non folding front sights. Barrel mounted in place. Utilizes a rugged spring loaded angled support system to eliminate getting caught up in brush and other combat hazards. Made of steel and also uses the standard front sight post. Folding Front Sight with integral gas block. Fits Standard size AR15 (750) barrel"" and has bayonet lug.