heh... i have r2 sf from r0+r5
incidentally... r4 does not necessarily mean better than r3
because a r4 shooting at r3 does the same damage as a r3 shooting at r3. and r4 shooting at r4 will do less dmg than a r3 shooting at r3... usually.
in either case... shooting range is bugged and is atm (and for the last year and a bit) pretty much infinite anyway.