I have a SW9V purchased new in 1996. What laser sight will work without making any modifications? Is there an adapter available to mount a laser?

I've never seen any lights, lasers, or adapters manufactured for direct mounting on an SW9V.

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Ain't This Fun Though?

Lasermax made a guide rod laser for the fullsize 9F, but not sure if they ever made one for the 4" or not. Probably not available anymore though. I have Meprolight night sights on my 40F and the laser.

Rosewood

The discontinued Crimson Trace LG-406 should work - there are a few on Ebay.

LG-406 Laserguard(R) for Smith & Wesson Sigma Full-Size | CrimsonTrace

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