There's no way to make use of weapons without risking them falling into enemy hands.
Here's What You Need to Remember: Out of fifty-nine missiles launched at Syria in April, it is possible one or two failed to explode and were recovered. High-explosive weapons frequently don’t explode: 30 percent of the Allied artillery shells fired during World War I at the Battle of the Somme might have been duds, while modern cluster bombs have a dud rate as high as 20 percent.
Here’s a tip: if you don’t want the enemy to capture your weapons, then don’t use them.