I believe the original poster is asking about these:
http://www.lasermax.com/product.php?id=103
http://www.lasermax.com/product.php?id=105
Basically, a LaserMax-made "LaserGrip," which I think skirts the ragged edge of infringing on Crimson Trace's patents. From what I can see on the website, it's a 3-piece unit: the laser module, which apparently bolts directly to the frame using extended sideplate screws, and 2 grip panels, containing the activation switch and batteries.
- I dunno about the "maintaining sight alignment after battery change" thing; it may be a
theoretical problem with Crimson Trace, but I haven't noticed it with the CT LG-205's I've had on my S&W 642 since about 2000.
- Putting the laser emitter high above the cylinder instead of below(CT) would significantly reduce the bore offset between the laser-dot and the muzzle, but the laser housing would then protrude into view when aiming with iron sights(but then, why aim with irons when you've got this cool new laser on the gun, anyway?
).
- If it still uses CR2032/DL2032 batteries, great - I just bought a pair at Best Buy for $5.49.
- The selectable beam feature(pulsing vs. constant) seems neat, maybe not absolutely necessary, but MAY attract users who prefer a constant beam like CT uses.
- The activation switch
looks like a cross-bolt-type affair, similar in principle to the activation switches on all their semi-auto guide-rod-type lasers; the CT pressure-switch activation seems more natural and faster to use IMO, and
may be somewhat more resistant to dust/moisture.
- The price is comparable to the CT LG-205, but LaserMax hasn't yet gotten to the stage of offering rubber overmolding like Crimson Trace; for a pocket/ankle/deep CCW gun like the S&W J-frames, rubber on grips is a debatable advantage, though(less felt recoil vs. sticking to clothes).
- If I needed another "laser-grip" for a J-frame, I'd be comfortable buying/using this LaserMax unit; the company has always made quality, durable products so far, and I doubt they'll cut any important corners on a product like this, where they're trying to lure market share away from Crimson Trace.
P.S. - It just occured to me, LaserMax may want to make a deal with the Barami Hip-Grips people, and offer a version where you can install a grip panel with a belt-waistband hook on it, for holster-less IWB carry. Now, THAT would be something I would be VERY interested in...