Re: Robar Glock grip reduction
I have their reductions on both a model 20 and a 21, as well as added beavertail to make them more closely resemble 1911 angles. Robar is not inexpensive but they do great work; full marks all around. If your muscle memory is more tuned to 1911s this makes transitioning between the two about as seamless as it gets. Recommended without qualification.
Best,
James