The Streamlight TLR-4 Compact Rail Mounted Tactical Light with Laser Sight is impact-resistant and is designed for use on compact and sub-compact handguns. The C4 LED technology has an output of up to 110 lumens and a 640-660 nm red laser....more
The light and the laser are both bright and clear. Adjustments to the laser aim point are smooth and seem to hold well. I haven't fired my pistol with this unit attached yet but I am confident it will work well.
Unfortunately, at present, this item is presently out of stock. We currently do not have inventory to check, and cannot guarantee the item will be restocked. Please feel free to check back with us periodically to see if the item has returned. overstockcustomercare1 on Dec 17, 2012
Yes this will fit your glock 21. I have used this on my duty glock 21 & 22 without any trouble.fonemann2 on Jan 20, 2014
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