ok icall thees lock bombs because...you can guess
just go to a model shop and buy ALUMINIUM pipe about the width of an airgun bullet and buy some visco/blackmatch fuse and some cap gun bullets (plastic ones)now cut about 1 cm piece off the allo pipe and insert a fuse one side and squeeze that side shut with needle nose pliers now get 3 cap rings and squeze the red powder out and the paper but bee careful now put the powder in the opened side of the pipe and squeeze that side shut. your done! now when you light the fuse it should make a sound a little less than a sledge hammer hittind brick and metal shrapnel will fly off every where thees can easily blow off a window lock so bee carefull!