Simple G-4 mainliner

[Mike Hussey]

Basher, tried to rob vault by a bomb. But while entering the vault, alarm ringed. Rusty flashes his badge:

Rusty: Peck, A.T.F. Let me venture a guess. Simple G-4 mainliner, back wound, quick fuse with a drag under 20 feet.

What does "Simple G-4 mainliner" mean?

Source: Ocean's Eleven (a 2001 American heist film directed by Steven Soderbergh and written by Ted Griffin)

 

[teechar]

Why do you keep asking questions about film transcripts?

 

[emsr2d2]

Basher no comma here [STRIKE]tried[/STRIKE] is trying to rob a vault by using a bomb, but [STRIKE]while[/STRIKE] as he [STRIKE]entering[/STRIKE] enters the vault, an/the alarm [STRIKE]ringed[/STRIKE] rings. Rusty flashes his badge:

I think you need to stop watching films and do some serious English study. Note the multiple corrections above. Until you can master the basics of the language, you shouldn't be spending your time watching films and asking us to explain all the tiny details.

 

[Rover_KE]

... you shouldn't be spending your time watching films and asking us to explain all the tiny details.

... especially when they depend on specialist knowledge or familiarity with the dated underworld slang of two decades ago.

 

[teechar]

Mike, you still haven't responded to our posts above, and you continue to post new threads about movies. Again, can you tell us what you're trying to achieve?