MCRP 12-10B.1, page 239
Military Operations on Urbanized Terrain (MOUT)
Marine Corps Reference Publication: Military Operations on Urbanized Terrain (MOUT)
Public distribution statement A; S2 KOCOA cited as MCRP 12-10 b.1
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furniture, home appliances, and bedding can be easily penetrated by both 7.62-mm and
.50-caliber rounds (Tables B-5 and B-6).
(a) The M240G machine gun can be hard to hold steady enough to repeatedly hit the
same point on a wall. The dust created by the bullet strikes also makes precise aiming
difficult. Firing with a tripod is usually more effective than without, especially if
sandbags are used to steady the weapon. Short bursts of three to five rounds fired in a
U-type pattern are best.
(b) Breaching a brick veneer over cinder block presents a special problem for the
M240G machine gun. Rounds penetrate the cinder block but leave a net-like structure
of unbroken block. Excessive ammunition is required to destroy the net because most
rounds only pass through a previously eroded hole. One or two minutes of work with
an entrenching tool, crowbar, or ax can remove this web and allow entry through the
breach hole.
(c) The .50-caliber machine gun can be fired accurately from the tripod using the
single-shot mode. This is the most efficient method for producing a loophole.
Automatic fire in three- to five-round bursts in a U-type pattern is more effective in
producing a breach.
Type
Thickness
(Inches)
Hole Diameter
(Inches)
Rounds Required
Reinforced concrete
8
7
100
Triple brick wall
14
7
170
Concrete block with
single brick veneer
12
6 and 24
30 and 200
Cinder block (filled)
12
N/A1
18
Double brick wall
9
N/A1
45
Double sandbag
wall
24
N/A1
110
Log wall
16
N/A1
1
Mild steel door
3/8
N/A1
1
1Penetration only, no loophole
Table B-5. Structure Penetrating Capabilities of 7.62-mm Round (NATO)
Against Typical Urban Targets (Range 25 Meters)
Military Operations on Urbanized Terrain
B - 7