These are excellent laser sights - Crimson Trace CMR-201 Rail Master Red Laser Sight w/ Universal Mount

I bought one of these years ago. love it. Now mounted on a Byrna HD. Needed a second one for a new Byrna TCR. Looked for low prices as this sight can run to $169. Lowest price was OpticsPlanet. An older model. Fits the side rail on the TCR perfectly. Got it zeroed to the sights in a few minutes and love it. Replacement batteries easy to get, lasts up to several years depending on the use. Note: the W and E adjustments are messed up when mounting on the side of a device instead of under or over. But, you can figure that out. The W becomes the elevation adjustment and the E becomes the windage adjustment. Best price, shipped quicker than the original estimate. Thank you OpticsPlanet!