Trigger over travel hex drive set screws. I found these sizes can be difficult to find in local stores. I ordered on-line from a commercial fastener supplier, but I was forced to buy quantities greater than needed. Selling the extras just to recover part of my costs. These are 1/16" allen wrench drive, and have thread locker applied by the manufacturer. Thread sizes and quantities: 5-40 1/4" long (eight) 6-32 3/16" long (twenty two) 6-32 3/8" long (twenty two) $20 shipped for all fifty two screws. PayPal no fee friend/family, USPS MO, or cash. Photo shows one each of the three sizes.