A vast improvement - Crimson Trace Lasergrip For Beretta Model 21/32 ACP LG490

If you're carrying a 21A, it's because you're lightly dressed and the 21A is better than nothing. The charm of this laser is that it gives you the opportunity to illustrate to a miscreant approximately where the bullet is likely to strike. Hopefully, that will be adequate for the adversary to reconsider their plan and you won't actually have to fire.

As to size of the unit itself, it doesn't add much to the tiny little 21A. Sure, a little, but not enough to make it worth consideration. To me, at least.

I was concerned with some of the review comments that the activation switch is in the wrong location. I think that depends on the size of your hands, because I've had no problem at all with it. For reference, I'm 5'7" with average size hands. Your mileage may vary, depending on the size of your hands. You can also keep from activating it just by not pressing as firmly as you normally would with your ring finger, if you're still trying to de-escalate the situation but want to be ready.

The one thing about it that I do NOT care for is that it comes from the factory zeroed for 15 yards. Hey, if someone is 15 yards from me, I'm not about to shoot them with a .22 unless they're shooting at me. Ten feet would be more appropriate, but of course, you can adjust it to your preference. My concern is that in the heat of the moment, you might rely on the laser for sighting at an other-than-zeroed distance, and at the distances that one should use a tiny pistol, you can be off enough that the bullet is going somewhere other than the laser dot.

My thought is that this is a fine product for deterrence. If you start playing a laser around the bridge of my nose, I'd pay close attention.