The DS-121 Defender Series™ Accu-Guard™ Laser Sight by Crimson Trace fits GLOCK Full-Size and Compact pistols. The Defender Series sets a new standard in laser sight for GLOCK pistols by providing cutting edge design, superior technology, and an affordable price tag. The DS-121 features Beam Lock™ Adjustments so that the user can easily adjust laser sighting for both windage and elevation, and the unit is pre-sighted at the factory at 50 ft. The Dual Side N-Gage™ Activation Buttons provide a large, easy-to-find, bright red activation button, which emits a powerful (5mW peak, 620-670nm, Class 3R) red aiming laser.
|By Platform||Defender Series™|
|Activation Location||Dual Side N-Gage™ Activation|
|Sighting||Factory Sighted at 50'|
|Battery Type||One 1/3N Lithium or Two 357 Silver Oxide Batteries|
|Laser Battery Life||Approx. Two Hours|
|Laser Output||5mW Red Laser|
|Activation Mode||Switch Activated|
|Laser Visibility||Approx .5 Inch Diameter at 50 Feet|
|User Adjustable||Windage and Elevation|
|Warranty||One Year Limited Warranty|
|Color||Black w/Red Activation Buttons|
|Dot Size||Approx. 0.50" at 50'|
Nice and compact Review by Tony0914
Excellent product. Fit well and stays in place. Needed a little tweaking from factory zero but that's expected with any product. Seems durable after 800+ rounds still functions like new on glock 19. Appears to hold zero well, after almost 1000 rounds have NOT had to re zero. I don't run it on all the time I just turn it on every 100 rounds or so to check POI matching POA. So far so good, another winner by Crimson Trace. (Posted on 1/5/15)
Compact and cost effective Review by CC
I've only put about 50 rounds but not problems and I really like the platform.Great price point and I would like to see the same setup for M&P pistols. (Posted on 10/13/14)
Not very durable - cannot recommend Review by Kurt
After putting several hundred rounds through my Glock 23 my 2nd DS laser has now gone dark and no longer works. This is 2nd laser that has done this to me, the first laser did the exact same thing and was replaced by Crimson Trace. Now the replacement has broken in the exact same manner It seems these lasers cannot take the recoil or sheer number of rounds before they fail and are unusable. My 2nd laser failed after 500 rounds, tried new batteries but no avail.
Too bad too as I really liked this sight, it just isn't durable enough as evidenced by now 2 separate DS units complete failing from just shooting with it.
Kurt (Posted on 7/27/14)
Great product for the money Review by Fonzi
I installed the DS-121 on my Glock 35, (took less than five minutes). Went to the range and "zeroed" it in for 50 feet (factory alignment was a bit off). I hit the "head" shot ten out of ten times under rapid fire. (Posted on 4/25/13)