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www.quora.com/Is-a-quarter-stick-of-dynamite-the-same-as-an-M80-firework-If...

Not even close. The M-80 is called an M-80 because that was the military’s designation for it. It was designed as an “artillery simulator” for training purposes. The idea was that instructors could light them near troops who were participating in ...

www.reference.com/science/quarter-stick-dynamite-c07fd9248b795d70

A quarter stick of dynamite has an average size of 1 inch in diameter and 6 inches in length. It is made with thick cardboard walls and filled with explosive powder. A quarter stick, which is also called an M-1000, is usually used as a firecracker.

en.wikipedia.org/wiki/Quarter_stick

However, quarter stick firecrackers do not contain nitroglycerin as dynamite does, and have far less explosive power. In the United States, quarter sticks and similar large firecrackers are illegal to manufacture or possess without a BATFE High Explosives Manufacturing License. They are sometimes colloquially known as M-1000s or "block busters".

dynamitefireworks.com/firecrackers-dynamite-fireworks-store

Although these firecracker items look like half sticks, quarter sticks and full sticks of dynamite, they do not resemble them in noise or danger or illegality! These novelty firecrackers simply contain multiple firecrackers (anywhere from 50-300) on a single fuse…from the Dyno Stick to the Jumbo M5000 and M1000.

en.wikipedia.org/wiki/M-80_(explosive)

Contrary to urban legend, an M-80 that contains 3,000 mg of powder is not equivalent to a quarter-stick of dynamite. Dynamite generally contains a stable nitroglycerin based high explosive, whereas M-80s or any other kind of firecracker contains a low explosive powder, like flash powder or black powder.

answers.google.com/answers/threadview/id/294465.html

Quarter sticks were banned by the CPSC in 1966, and made illegal by the BATF (now ATFE) in the 1970's. Legal quarter sticks today contain 50 milligrams of flash powder, which is about 1/200th of the original quarter stick. Illegal quarter sticks can contain compositions that are extremely sensitive to shock and can injure of kill without warning.

forums.anandtech.com/threads/whats-the-most-potent-explosive-you-can-buy-these...

For whatever reason, we decided to get some pipe from the hardware store and some caps. We stuffed it with crushed sparklers and some stuff from a fountain (i think) and sealed it off. We lit it and i swear it was twice the sound of a 1/4 stick of dynamite.

www.youtube.com/watch?v=ULUbetLlFr0

Demolition Demonstration of large firecrackers. This feature is not available right now. Please try again later.

www.atf.gov/resource-center/fact-sheet/fact-sheet-illegal-explosive-devices

ATF investigates the use of illegal explosive devices which, are often manufactured and used during the fireworks season. Explosive devices commonly referred to as M-80s; M-100s, M-250s; M-1000s, and cherry bombs exceed the U.S. Consumer Product Safety Commission's explosive weight limits for consumer fireworks and are therefore classified as illegal by ATF and many other law enforcement agenc...