Classic Army SCAR-L = From standard-length to CQB.
 

I want to change my standard length SCAR-L to a CQB style variant.
The inner barrel of the CA SCAR-L(from what I see from doing some research on the internet) is 384mm.
If I want to change it into a CQB variant(I just want to attach a flash hider without the use of an outer barrel to the gun itself - and also without the inner barrel sticking out of the flash hider) what kind of tight-bore barrel should I buy. 300mm or 363mm?

Thanks in advance guys,

Well considering 363mm is only 2cm shorter than your current inner.....I'd say the 300mm. It's what's used for M4 CQBR's as well.

Thank you very much my friend.