Indians For Guns

hello gun lovers...
plz tell me some answers for my queries.
1)what is the difference between a ordinary .388 round and a .357 magnum,& also what is this magnum?
is it the unit for mearsuring barrel grooves or else?
2)what is the difference between A PDW (personal defence weapon) & PSDW (personnel security development weapon)?
3) which design is more efficiant?
a}a bull pop?(a magzine behind the trigger assembly)
b} a conventional buffer & trigger assembly?
& if any one choice then why???


thanks ,
regards
adidestroy
just destroy....

Answer 1: Difference between an ordinary .38 (Special) and the .357 Magnum is case length and pressure, i.e. power. "Magnum" (Latin "great") was originally a term for a larger than common bottle of champagne. Later is was applied to cartridges of greater capacity and more powerful than their predecessors. It's a term much abused and misused in American usage. For an answer to 2., you'll have to ask the people who came up with those terms! Cheers.

Wonder where I can buy a 'bullpop'..Would be mighty useful.

Think that might be a can of "Red Bull", so a grocery store. Cheers.