this is the fastest safety you will ever have! featuring the hoffman tactical 2 pos super safety active reset system, a drop in safety that requires only a slight rounding of your milspec trigger and a rounded safety detent! no 45 degree cuts and no extra BS just make sure you have a full auto rated BCG and an H2-3 buffer in case of light primer strikes. this pack comes with 5 safeties and 10 levers so you can test them on all of your builds! printed in pa6cf these will last well over 500 rounds dependent on trigger pressure, more trigger pressure IE squeezing too hard can shorten the lifespan of the material. this is a semi auto safety and will only fire 1 round per trigger pull, this is not a FA conversion, the bolt carrier upon firing will reset the trigger via the lever rotating the safety, and when it is back in battery the safety rotates back into the fire position allowing you to pull the trigger again in rapid succession. we recommend this be installed by a qualified gunsmith    lead time 3-5 business days 10% restock fee