Quoted: I know there are other laser devices that can be had, but what is so special about the OTAL? I'm not bashing just wanting to know........
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It's a solid & reliable little unit. I have had one for over a year, it has been mounted for thousands of rounds and still works perfectly, has never lost zero, couldn't be more satisfied.
From the Laser Devices website:
Complies with MIL-STD-810
Fits all NATO 1913 and Picatinney rails
No tools required
Offset design allows the laser to be mounted behind the front sight cage on AR-15, M-16 and M-4 style rifles
Operates using a single AA battery
Standard with a pressure pad switch and rotary ON/OFF switch
Windage and elevation adjustment knobs are protected from impact
Windage and elevation adjustments can be made in precise 0.4 milliradian clicks
Mechanical Specifications:
Environment: Waterproof to 20 meters
Length: 2.8 in.; 7.2 cm
Limited Warranty: One year
Material: Anodized aircraft aluminum 6061T-6
Weight: 4.9 oz.; 138.9 grams with barttery
Width: 1.4 in.; 3.6 cm
Electrical Specifications:
Battery: One 1.5 volt AA
Battery Life: 5 hours continuous
Beam Diameter: 6.5 mm @ 25 meters
Laser Type: Laser Diode Class IIIa
Power Output: <5mW
Range/Visibility: 450 meters (low light) 30 meters daytime
Wavelength: 635nM (SPP)