You obviously have not looked at the OOBs - RCL with a ranging MG (MOBAT say) and those with a 12.7 spotting rifle (WOMBAT for example) will have better RF than "naked" RCLs. Check the UK OOB - ther eprobably are others with differing stats as well.
(My battalion had
2 AT platoons, one with each type, back in the 1970s... but 1/51 Highland (V) was one of those truly weird cases that you love to beat TO&E freaks about he heads with
. Heck - one company even had their
very own tartan (London Scottish))
The design guides are a starting baseline, and not gospel. So if your team actually had laser RF on some of their RCL - go large. The points calculator will charge for them, after all.