Question to all SIRT owners/users

I’m researching the SIRT pistol, looking into the basic red laser version.

For anyone who has used a SIRT, do you find that your laser group size matches your live fire groups? Meaning, if you trained only on SIRT to halve your group size - would you be able to pick up a Glock and see the same degree of improvement? Slow fire of course, since SIRT doesn’t help with recoil management/recovery.