Charge, Demolition: Roll, M186
Charges - continued
a. Description. Roll demolition charge M186 is
identical to charge M118 except that the explo-
sive is in the form of a 50-foot roll on a plastic
rather than in sheet form. Each foot of the roll
provides approximately 1/2 pound of explosive.
Included with each roll are 15 blasting cap hold-
ers M8 and a canvas bag with carrying strap.
For explosive content see note in 1-6e (1).
b. Uses. Roll demolition charge M186 is used
a. Charge, Demolition:
in the same manner as block demolition charge
Shaped demolition charge
M2A3 contains approximately 9-1/2 pounds of
cially adaptable for demolishing targets which
composition B with a 50-50 pentolite booster
require use of flexible explosive in lengths
weighing approximately 2 pounds in a moisture-
longer than 12 inches.
resisting molded fiber container. Older models
are completely pentolite loaded. A cylindrical
c. Advantages. Roll demolition charge M186
fiber base slips on end of charge to provide a
has all the advantages of the the charge M118.
standoff distance. A cone of glass is used as a
Charge M186 may be cut to exact lengths
cavity liner in this charge.
b. Charge, Demolition:
d. Limitations. The adhesive backing will not
M2A4. Shaped demolition charge M2A4 is less
adhere to wet or frozen surfaces.
sensitive to gunfire than charge M2A3. Charge
M2A4 is identical to charge M2A3 in perform-
Charge, Demolition: Shaped
ance, except that the 50-50 pentolite booster
has been replaced by 50 grams of composition
(Refer to table 1-3 for additional characteris-
A3. Also, the main charge of composition B has
tics). Shaped demolition charges used in mili-
been increased to maintain same total weight
tary demolition operations are tapered round
as charge M2A3.
blocks of high explosive having a lined, conical
cavity in one end which directs the cone liner
c. Charge, Demolition: Shaped (40-Pound) M3.
material into a narrow jet for penetrating
Shaped demolition M3 charge contains approxi-
metal, concrete, earth or other materials.
mately 28.3 pounds of composition B with 1.7
Maximum penetration is obtained when the
pound booster of 50-50 pentolite in a metal con-
charge is exploded at a specific distance from
tainer. The cavity liner is made of metal. A
the target, called standoff. A standoff distance
metal tripod for obtaining a standoff distance is
is provided by a fiber sleeve or metal legs sup-
porting the charge.
A carrying handle is
attached to each charge. Shaped demolition
d. Charge, Demolition:
charges are used primarily to bore holes in
Shaped demolition charge
earth, metal, masonry, concrete, and paved and
M3A1 is less sensitive to gunfire than charge
M3. Charge M3A1 is identical to charge M3 in
performance, except that the 50-50 pentolite
Table 1-3. Characteristics of Shaped Demolition
booster, has been replaced by a booster of approx-
imately 50 grams of composition A3. Also the
m a i n charge of composition B has been
increased to maintain the same total weight as
e. Charge, Demolition Mk 74, Mod
1, Shaped (fig.
1-10a). Small specialized shaped charge used
by EOD personnel.
1-9. Charge Assembly, Demolition
a. Charge Assembly Demolition: M183 (fig.
11). Demolition charge assembly M183 consists
of 16 block demolition charges M112 (comp C4),
Change 16 1-10.3