Frag Grenade

Cut a piece of primacord of whatever length needed to provide a branch line to a primacord main line. Usually about 3 or 4 feet is sufficient. 

Repeat the process for as many additional charges as are needed. 

For a heavy ambush the frag grenades may be interspersed with the scatter charge previously described, mortar shells, or with other improvised fragmentation charges. 

Although more powerful than military fragmentation grenades, the improvised version described below is not as easily armed and thrown. It is advisable, therefore, to thoroughly test the time fuse used and perhaps to practice with a dummy model of the grenade before attempting to use a live one operationally. 

MATERIALS Metal fragments (nails, washers, bolts, nuts, screws, etc.), rags, string or tape, time fuse, nonelectric blasting cap, % pound of any high explosive. 

---

Spread the points of the cotter pin safety to prevent accidental dislodging and then unscrew the fuse assembly of the frag grenade with pliers. The fuse may be saved for use as an improvised firing device or the blasting cap may be removed for other uses (see section on improvised detonators). ... 

As with any frag grenade, the user must protect himself from flying fragments. A prone position in a ditch, or shelter behind a tree, stump, or boulder will be sufficient protection. 

Any number of mortar shells may be prepared either with the plastic explosive technique or by using the booster and attached by their primacord branch lines to a main primacord line for simultaneous firing. Or they may be interspersed along a road or trail with frag grenades or other improvised charges. 

---