If neither of these have one available, polymerpew.com will be my 3rd selection ,but I believe they acquire their's from Deeznutz. The polypew male has a terrific rep about the fbook SS team providing modified triggers Forced reset triggers will need tuning along with a heavy buffer on the AR-15, https://frt-trigger-for-sale35679.review-blogger.com/55828788/5-essential-elements-for-forcedresettrigger-net