Have just bought a mid-section (second hand) from a Nur Spec R and now need a backbox.

When getting a back box only is there any difference a Nur Spec and a Nur Spec R????

Was under the impression the backbox's are the same, but adding the midsection makes it an R

 

Dunno mate, should be nice and loud though...
I've got a 3.5 pee shooter for sale if your interested...
After a jap syle one too... if you come across any cheap mate... let me know...