USCGC Calhoun M4 250516-G-HW752-1002
The no-frills setup runs an Aimpoint Patrol Rifle Optic (PRO) red dot reflex sight on a QRP2 mount rather than an ACOG or Elcan. His short quad rail has an inexpensive ($125 if you shop around) Streamlight TLR RM2 1,000 lumen white light. Note the KAC 300M flip-up rear sight in case the Aimpoint takes a nap. Magpul PMAG and Mechanix gloves for the win.