IBOLC Comprehensive Study Guide updated 2023

Steps to EA Development - Answer- 1. Identify likely enemy avenues of approach 2. Identify likely enemy scheme of maneuver 3. Determine where to kill the enemy 4. Plan and integrate obstacles 5. Emplace WPN systems 6. Plan and integrate indirect fire support 7. Conduct an engagement area rehearsal Steps to COA Development - Answer- 1. Analyze Relative Combat Power 2. Generate Options 3. Array Initial Forces 4. Develop Concepts of the Operations and Schemes of Maneuver 5. Assign Headquarters 6. Prepare COA Sketches and Statements Five Point Contingency Plan - Answer- GOTWA G - Where you are going. O - Others you are taking with you. T - Time you will return. W - What do you if you don't return in time. A - Actions to take on contact for me and you. Five Principles of Patrolling - Answer- 1. PLANNING - Develop a simple yet effective plan and communicate it down to the lowest level. 2. RECON - Confirm what you think you know and find out what you don't. 3. SECURITY - Preserve the fighting force of the unit. 4. CONTROL - Emphasis the CDR's Intent and CONOP and make sure it is clearly understood by all. Also, place yourself where you are most needed. 5. COMMON SENSE - Make timely and effective decisions using all available information. Rates of Fire, M249 SAW - Answer- FM 3-22.68, Crew Served Machine Guns SUSTAIN - 50 rds/min., 3-5 rds burst, 4-5 sec. hold, 10 min. barrel change RAPID - 100 rds/min, 8-10 rds burst, 2-3 sec. hold, 2 min. barrel change CYCLIC - 650 to 850 rds/min., continuous burst, 1 min. barrel change Rates of Fire, M240 - Answer- FM 3-22.68, Crew Served Machine Guns SUSTAIN - 100 rds/min., 6-9 rds burst, 4-5 sec. hold, 10 min. barrel change RAPID - 200 rds/min., 10-13 rds burst, 2-3 sec. hold, 2 min. barrel change CYCLIC - 650 to 950 rds/min., continuous burst, 1 mon. barrel change M240 Description - Answer- The M240 is a belt fed, gas operated, air cooled machine gun that fires from the open bolt position. It can be fired from a bipod, tripod, vehicle mount, or aircraft mount. Length: 49 inches Height (M122A1 Tripod): 17.5 inches Weight: 27.6 lbs M249 SAW Description - Answer- The M249 SAW is a belt or magazine fed, gas operated, air cooled automatic weapon that fires from the open bolt position. It can be fired from the shoulder, hip, underarm, bipod, or tripod. Length: 40.87 inches Height (M122 Tripod): 16 inches Weight: 16.41 lbs Basic Load of M249 SAW - Answer- 1000x5.56mm rounds in 5x200 round drums each weighing 6.92 lbs. Ball and tracer ratio of 4:1. Ranges of M249 SAW - Answer- Max. Range: 3600m Max. Effective: 1000m Suppressive Fire: 1000m Max. Grazing Firing: 600m Tracer Burnout: 900m (+) Area Target, Tripod: 1000m Area Target, Bipod: 800m Point Target, Tripod: 800m Point Target, Bipod: 600m Basic Load of M240 - Answer- 900-1200x7.62mm rounds in 100 round bandoleers with disintegrating links. The M240 requires a three man crew to operator effectively. Ranges of M240 - Answer- Max. Range: 3725m Max. Effective: 1100m Suppression: 1100m (or 1800m?) Max. Grazing Fire: 1100m Tracer Burnout: 900m (+) Area Target, Tripod: 1100m (or 1800m?) Area Target, Bipod: 800m Point Target, Tripod: 800m Point Target, Bipod: 600m War Fighting Functions - Answer- 1. Intelligence 2. Mvmt. & Maneuver 3. Fire Support 4. Protection 5. Sustainment 6. Command & Control *All circled around LEADERSHIP M4A1 Description - Answer- FM 3-22.9 The M4A1 is a magazine fed, gas operated, air cooled, and shoulder fired 5.56mm rifle. Length, Butt Stock Open: 33 inches Length, Butt Stock Closed: 29.75 inches Weight, No Mags.: 6.49 lbs Weight, 30 rds Mag.: 7.5 lbs Rates of Fire, M4A1 - Answer- Max. Effective: 45 rds/min. Sustain: 12-15 rds/min. Automatic: 150-200 rds/min. Ranges of M4A1 - Answer- Max. Range: 3600m Area Target: 600m Point Target: 500m Functions of an M4A1 - Answer- 1. Feeding 2. Chambering 3. Locking 4. Firing 5. Unlocking 6. Extracting 7. Ejecting 8. Cocking Basic Load of M4A1 - Answer- 220x5.56mm rounds in 7x30 round magazines. MOA of M4A1 - Answer- The M4A1 is a 3 MOA rifle. At no error of the shooter, the M4A1 will group in; 3 inches @ 100m target 6 inches @ 200m target 9 inches @ 300m target Minute of Angle (MOA) - Answer- MOA is a consistent unit of measurement used by all rifles and is equal to 1/60th of a degree. MOA=Inches/Range OR Inches=(MOA)(Range) Inches = Off from Point of Aim (POA) Range = 100s of meters Iron Sight MOA Adjustments - Answer- Elevation, Front Sight Post: 1 click=7/4 MOA BUIS/Windage, Rear Dight Post: 1 click=3/4 MOA M68 (CCO) MOA Adjustments - Answer- Elevation and BUIS: 1 click=1/2 MOA ACOG MOA Adjustment - Answer- Internal: 1 click=1/3 MOA External: 1 click=1/2 MOA Wind Formula for 5.56mm - Answer- [(Range)(Velocity)]/7=MOA Range = 100s of meters Velocity = Wind Velocity in MPH **MOA(1/2) for half value wind Paragraphs of OPORD - Answer- FM 6-0 Appendix C 1. Situation 2. Mission 3. Execution 4. Sustainment 5. Command and Control Types of Zeroing - Answer- 1. Battle Site Zero 2. Bullet Drop Compensation Zeroing Range, Iron Site - Answer- 25m for a 300m zero Zeroing Range, Bore lighting - Answer- 10m Zeroing Range, ACOG - Answer- 100m Zeroing Range, M68 - Answer- 200m When zeroing, all adjustments are based off ______________ - Answer- The strike of the round Primary Forces Acting on Round - Answer- 1. Gravity 2. Air Resistance Ways to Counteract Forces Acting on Round - Answer- 1. Increase angle of departure by raising the barrel 2. Impart spin on round 3. High velocity What is Zeroing? - Answer- Changing the sites so that the rounds goes where the shooter is aiming Sight Alignment - Answer- A consistent and straight line with the shooters eye, rear sight post, and front sight post. Sight Picture - Answer- A consistent and straight line with the shooters eye, rear sight post, front sight post, and target. Elements of a Solid Firing Position - Answer- 1. Non-firing hand 2. Firing Hand 3. Elbows 4. Stock Weld 5. Rifle Butt