The timney 49'r safety selector can be used in either the normal 90 degree or for ultra quick changes a 49 degree short throw.It is precision machined heat-treated steel with a replacement spring and carbon nitride coated safety plunger for ultra-smooth operation.The safety features an end plate allowing the removal of the ambidextrous arm if a one-sided safety is preferred.The 49'r is a true drop-in part that will work with any mil-spec lower receiver.Made in the usa.Finish: BlackType: Safety SelectorModel: Safety SelectorMaterial: SteelHand: Ambidextrous