Steel Knurled Head Thumb Screw - 92581A320
Attach your Primary Arms prism scope to a carry handle AR15 with this black oxide steel thumb screw. The head is knurled for a good grip with your fingers, so no tools are needed. Black oxide finish, M5 threads, 8mm long. Works with products PAC3X-ACSS-5.56 and PAC5X only.