(5) Assure that smoke is coming from the fuse (or
out of the vent hole in the igniter) and withdraw to a safe
The mechanism of the M81 is identical to
distance or appropriate cover.
that of the old M60 Igniter and it can there-
fore be recocked and actuated again imme-
diately if the primer doesn't fire. (Hold the
igniter firmly and push the pull rod back
USED SHOCK TUBE MUST NOT BE
into the igniter until a click is heard or felt
BURNED FOR DISPOSAL BECAUSE
and again sharply pull the pull ring to actu-
OF POTENTIALLY TOXIC FUMES
ate it). If the igniter's primer fires but the
GIVEN OFF BY THE BURNING PLAS-
charge does not, refer to paragraph 2-c.,
BREATHING THE FUMES
Misfires With Shock Tube.
FROM THE BURNING SHOCK TUBE
PLASTIC MAY BE HAZARDOUS TO
c. Initiating a shock tube priming system with an M14
or M18 Shock Tube Blasting Cap.
d. After the charge(s) has(have) successfully fired, it
(1) The primary operator will open an M9 Blast-
is the responsibility of the unit commander to assure
ing Cap Holder and insert the M14's detonator and snap
proper disposal of the residue. The expended shock tube
smaller flap shut. Loop the shock tube from the next
is a nonrecyclable plastic and may be sent directly to an
blasting cap in the M9 and snap the larger flap shut to se-
approved landfill. Before disposing of M12, M13 and
M15 expended blasting caps, cut off caps and dispose of
caps as hazardous waste. The igniter body and some in-
(2) Use a sharp knife, a razor blade or a sharp cap
ternal parts are made of a recyclable plastic and therefore
crimper to cut 1/2-inch and the metal seal/cover from the
must be recycled. Expended Time Blasting Fuse may be
free end of the M14 and M18 time blasting fuse.
disposed of with the expended shock tube.
(3) Secure a fuse igniter to the freshly cut end of
the M14 and M18 time blasting fuse or split the end with
a sharp knife and place the head of a match in the split.
Several manufacturers supply shock tube
and shock tube devices to the Army and
they use various plastics in manufacturing
the shock tube.
If the M81 Igniter is used, remove both
e. The M15 Delay Blasting Cap. The M15 is a 70-foot
length of shock tube with a high strength, 200-millisec-
ond delay (longer) detonator on one end and a low (relay
(4) Function the igniter or light the end of the fuse
cap) strength 25-millisecond delay (shorter) detonator on
with a matchhead in it with another match or a cigarette
the other. These detonators may be used to obtain a va-
riety of staged demolition effects such as (cliff) face re-
moval in quarrying or an effect in building demolition.
In lieu of detailed procedures, diagrams of typical setups
THE TIME BLASTING FUSE OF THE
standard Army practice.
M14 GIVES A NOMINAL 5-MINUTE
DELAY BETWEEN LIGHTING OF
ITS FUSE AND INITIATION OF ITS
ALWAYS ASSURE THAT THE
M700 FUSE, THE BURNING TIME
(SHORTER) 25- MILLISECOND DE-
WILL VARY WITH AMBIENT TEM-
LAY DETONATOR IS USED ONLY
TO INITIATE OTHER SHOCK TUBE
WITH THE ALTITUDE OF THE SITE.
BLASTING CAPS. IT IS OF LOW
(FOR EXAMPLE, OPERATING AT AN
STRENGTH AND MAY CAUSE A MIS-
ALTITUDE OF 12,000 FEET IN COLD
FIRE IF USED TO TRY TO INITIATE
WEATHER WILL EXTEND THE DE-
LAY TIME SIGNIFICANTLY).