What unit or prior experience, better yet how much do you go shooting... whats the wear on this lpk ... whats the failure point , have you done that ... how many rounds? how much stress can the lpk take.... never has happens, AR's are known for their upper parts blowing up before any LOWER WILL FAIL including a trigger.... please explain to me and tell me a numeric failure point for a trigger... the lpk will last longer than you can imagine.