Coach the Use of Optics

1. Coach the Use of Optics CMC 0933-FALT-2009

2. Overview • Design of the RCO • Nomenclature • RCO safety, warning and cautions • Care and maintenance of the RCO • Mounting procedures • Aiming

3. Learning Objectives

4. Method/Media • Evaluation • Safety/Cease training • Admin

6. Design of the RCO • Description • The Rifle Combat Optic (RCO) is an Advanced Combat Optical Gun sight (ACOG) designed for the M16A4, and M4 • Quick target acquisition at close range • Enhanced target ID and hit probability out to 800m

7. Design of the RCO • 2 variants with 2 Bullet Drop Compensators (BDC) • AN/PVQ31A : Bullet drop compensator matched to trajectory of 5.56mm from 20” barrel of the M16A4 • AN/PVQ31B : Bullet drop compensator matched to the trajectory of 5.56mm from 14.5” barrel of M4

8. Design of the RCO • Dual-illumination • Fiber optic light collector • Self luminous tritium • Engagement with both eyes open • Bindon aiming concept

9. Design of the RCO • Characteristics • Objective Lens 32mm • Magnification 4 power • Eye Relief 1.5 in • Exit Pupil 8mm • Field of View 7°/36.8 ft @ 100 yards • Length 5.8 in • Weight 15.3 oz w/mount, 11 oz w/out • Waterproof 66 ft w/adjustor caps installed • Tritium 0.1 curies (less than a Rolex) Useful for up to 15 years

11. Nomenclature Adjuster

12. Nomenclature

13. Nomenclature • Components • 1. Adjuster caps and retention wire assembly • 2. Adjuster cap retention wire • 3. Adjuster retention wire crimp sleeve • 4. Adjuster cap with fastener button • 5. Adjuster cap O-ring seals • 6. Eye piece bolt • 7. Rail interface, TA-51 mount • 8. TA-51 mount screws • 9. Anti-reflection device • 9a. O-ring seal • 10. Soft case, MOLLE brown • 11. Neoprene scope coat • 12. Leans cleaning tool

14. Nomenclature 3 1 9a 10 11 12

15. Nomenclature Reticle pattern Horizontal Stadia Lines Horizontal Mil Scale Horizontal Mil Scale Chevron 5 mil 10 mil

17. RCO Safety, Warning and Cautions • RCO Safety: Improper handling can lead to a hazard & make the RCO unserviceable • The RCO contains radioactive material for night illumination; Hydrogen-3, known as Tritium • Odorless, tasteless, colorless gas that is normally not harmful. • HTO, which is formed by the burning of Tritium is 10,000 times more hazardous • Breached RCO – Double plastic bag, contact your Radiological Safety Officer or Armorer

18. RCO Safety, Warning and Cautions • Before mounting place weapon in condition 4 • Do not over-tighten or force any screws. Hand tighten then ¼ turn • Do not over tighten windage and elevation adjusters • Waterproof only with O-rings installed • Clean with water only • Never attempt to disassemble the scope!

20. Care and Maintenance of the RCO • Use clean or soapy water to rinse foreign material from the external surfaces only. • Dry with dry, clean, soft cloth. • When cleaning lenses ensure no dirt is on cloth • Ensure Adjustor Caps are in place • Do not use any type of solvent or harsh chemicals • Use Lenspen

21. Care and Maintenance of the RCO • Serviceability check • Conduct a visual inspection for damage of: • Housing and exterior of lenses for cracks • Light collector tube for signs of damage. Bubbles or milky lines in tube are normal • Ensure the Adjuster Caps are fully seated • Ensure TA51 mount has all parts • Inspect ARD for visible damage

22. Care and Maintenance of the RCO • Serviceability check • Inspection of the tritium lamp should be conducted • Prior to each deployment • Every 6 months from date of last inspection • Immediately following an incident where you suspect the tritium lamp may have been damaged.

23. Care and Maintenance of the RCO • Serviceability check • Inspection Technique #1: Enter a dark room and allow 10 minutes for eyes to adapt. Observe illuminated chevron • Inspection Technique #2: Completely cover objective lens and fiber optic tube. Place eye close to eyepiece to observe illuminated chevron • If chevron is not illuminated turn in RCO

24. Care and Maintenance of the RCO • Maintenance • There is no user maintenance for the RCO other than keeping it clean • The RCO will never be disassembled, except by the manufacturer • Field maintenance is the replacement of the Adjustment Cap Retention System by a qualified armorer or optical repairman

26. Mounting Procedures TA51 Mount (M1913 Rail Adaptor) M16A4/M4 Flattop w/M1913 Rail

27. Mounting Procedures • If the TA51 mount has been loosened or removed, ensure Loctite or another approved adhesive is used when re-attaching it. Ensure TA51 Rail Mounting Screws Are re-secured w/Loctite if removed

28. Mounting Procedures • Prior to attempting to mount the optic, loosen the thumb screws and pull the interface clamp bar back against the knobs. • Ensure thumb screws are mounted on right side of weapon

29. Mounting Procedures • Align the interface stubs located on the bottom of the adapter with the grooves on the rail of the flattop receiver.

30. Mounting Procedures • With the RCO on the rail and assisted by another Marine • Move the RCO forward and back until proper eye relief is achieved • Finish mounting procedures Eye Relief 1.5 Inches

31. Mounting Procedures • Apply forward pressure on the optic and • tighten the knobs using finger pressure only. • Add another ¼ turn utilizing a coin or bladed • screwdriver. Caution: DO NOT tighten beyond this recommended method.

32. Mounting Procedures • Mark the Thumb Screw location with permanent marker or other means. • Installing the AN / PVQ-31 in the same position on the flattop rail and using the same torque on the thumb screws will ensure maximum zero retention

34. 4 6 100m 200m 4 4400m 300m 500m 6 600m 700m 800m Aiming

35. QUESTIONS

36. Summary • Design of the RCO • Nomenclature • RCO safety, warning and cautions • Care and maintenance of the RCO • Mounting procedures • Aiming