Universal LaserLyte laser trainer (good for revolvers and pistols) for $65 (another $5 to ship).
Fits everything from 380 to 45 and it sits in the barrel not the chamber so it's great for dry fire practice with revolvers.
Sells new for $99.99.
LaserLyte laser trainer UNIVERSAL fits 380 ACP, 9mm, .40 SW, .45 ACP, .38 Special, 10mm...
https://www.amazon.com/gp/aw/d/B010FMFRLO/ref=ya_aw_od_pi?ie=UTF8&psc=1