2018年3月22日星期四

Laser Gun Sight high-low temperature test






The addition of laser sights to your handgun, rifle or shotgun will allow you to dominate a potentially deadly force situation. Here are the advantages that the use of LASERWIN lasers offers the defensive shooter:

1.The use of a laser in low level natural light or interior light allows you to shift your focus forward from your front sight to the laser dot that is planted on the threat(s). This aids in threat identification as well as allowing you to clearly see anything that might be in their hands.

2.The use of a laser eliminates any doubt in the mind of a threat that they are in danger of being shot, as well as eliminating any doubt as to where the bullet will land after being fired. I personally witnessed the "stopping power" of a laser dot on a suspect without a shot being fired.

3.If your vision is somehow occluded (such as in heavy rain, or due to injury) you will be able to see the laser dot when you can't see the sights.

4.A laser will allow you to fire accurately from all kinds of unconventional or grounded positions, at times when you can't use your sights.

5.During training, a laser can help you improve your accuracy by helping you learn better trigger control while "dry firing". If you are jerking the trigger the laser dot will drop below the line of sight as the hammer or striker falls. Note that laser sights won't make you a better shot unless you use them to learn trigger control.
 Tactical Mini Pistol Red Green Dot Laser Adjustable Compact Sight Fit Rail Mount 20mm Hunting Scopes AirSoft


Zeoring laser gun sight rail mount on pistols handgun shotgun airsoft gun

Laser Sighting In Guide

LASERWIN laser sights are pre-sighted at the factory to 50 feet. Many times, no further adjustments are required. All of our laser products are fully user-adjustable for windage and elevation if further adjustments are desired. Assuming you are familair with sight picture and sight alignment, a good starting point is to align the laser with the fixed sights on the firearm. Please note that Infrared (IR) products require the use of IR capable optics.

A two-screw system is used to adjust for windage and elevation. The adjustment screws are located just behind the laser source. Use the supplied allen wrenches to make any adjustments. DO NOT OVERTURN THE ADJUSTMENT SCREWS. A little adjustment goes a long way. Rarely is more than half a turn required to make your needed adjustments. For additional information on your specific model, please refer to your product installation guide.

 Rechargeable Laser Sight Green Beam for Subcompact Pistols & Compact Handguns - Fits Springfield XD XD-S XDM S&W M&P Beretta PX-4 Taurus Millenium Walther PPQ PPS PPX PK380 Ruger SR9C

For complete step-by-step instructions, please refer to the videos below.


Sighting-In Recalibrating Your Laser Sight

This video discusses and demonstrates sighting-in and recalibrating, (if needed), your  laser sight.


Zeroing a Weapon Laser – Constant Offset vs Zeroed For Range
Laser sights can be a valuable tool for shooters.  They can aid in low-light shooting, allow for quick target acquisition and, some claim, act as a deterrent in defensive situations.  Lasers do not take the place of shooting fundamentals and they may not be for everyone (there is certainly not a consensus on their use), but they can be a useful supplement to a firearm’s fixed sights.  As long as they are properly aligned, that is…  But what does “properly aligned” mean?

What is “Zero?”
Generally, shooters will zero their weapon sights – whether it is a laser, an optical sight or something else – for a certain distance.  What does this mean?  Picture the trajectory of the projectile as it leaves the muzzle of a firearm.  Disregarding bullet drop, wind, atmospheric conditions and things of that nature, the trajectory should be roughly along a line parallel to the center axis of the barrel.  Ideally, to target where the projectile will impact, the shooter would want to sight along that trajectory.

The line of sight for a scope or iron sights is a straight line between the shooter’s eye and one or more points in the sight.  That straight line is a bit easier to visualize for a laser sight.  Since sights are typically placed above, below or to the side of a firearm’s barrel rather than looking down it, something called parallax is introduced.    Due to this offset, the line of sight and the center axis of the barrel are almost – but not quite – parallel.  At some point downrange, where the two lines intersect, is where the sights are zeroed.
Pistol Zero

The image above shows this concept.  Zeroing a sight for a certain distance is easy enough to understand and accomplish but, as you can see, at ranges other than the distance for which the sight is zeroed, the point of impact (POI) will vary from the point of aim (POA).  In this example at closer ranges the round would impact above the laser dot while rounds fired at longer distances would impact below the laser dot.  The further the target is away from the zero distance, the further the POA will be from the POI.  Greater distance between the center axis of the barrel and the sight will increase the severity of the POA vs POI difference because the angle between the two lines will be greater.

An Alternative – Constant Offset
There is an alternative configuration for laser sights that is popular with some shooters that eliminates the problem of the sights only being accurate at one distance.  The downside is that they are not entirely accurate at any distance.  The upside, however, is that the inaccuracy is the same at all distances (again, disregarding wind, bullet drop, etc.).

Pistol Parallel

The image above shows the constant offset scheme in which the line of sight is parallel to the barrel’s center axis.  You can see that the line of sight never intersects the line of the bullet trajectory, so the projectile will never impact where the laser dot is.  However, since the lines are parallel, regardless of the distance the point of impact will be the same distance, h, above the laser dot.  Of course, in the real world, there is bullet drop so gravity will eventually pull the projectile down across the laser beam.  According to this ballistic chart, assuming a 2″ distance between the barrel axis and the laser aperture, that will happen somewhere after 50 yards (150 feet) – much, much farther than the average defensive firearm situation which appens between 0 and 21 feet.  At these distances, bullet drop is less than bullet diameter.

Does it Matter?
It could be that this discussion is entirely academic when talking about practical handgun use inside of 7 yards.  Some may think that it doesn’t make any difference if their bullet impacts an inch or two away from the little red or green dot.  Some may prefer to trade not dealing with parallax in exchange for remembering an offset.  The same sight configuration may not be the same for the target shooter who uses a laser because they can’t quite make out their iron sights anymore as the CCW-er who has a laser only for their defensive firearm.

Regardless of which configuration you choose if you are using a laser, just remember that things can go wrong in the real world.  Batteries die, electronics get wet, connectors corrode, pocket lint gets in the way of laser apertures.  A laser isn’t a substitute for knowing how to accurately shoot your firearm with low-tech iron sights.  If Murphy’s Law holds true, when you need it most your laser sight will be, at best, a supplement to your skills and training.

 450 Lumen Pistol Flashlight & Green Laser Sight Combo Rechargeable Battery and Charger for Glock Series, Sig Sauer, Smith & Wesson, Springfield, Beretta, Ruger, and Heckler


 discusses and demonstrates the sighting-in process for your laser sight

TROUBLESHOOTING THE SIGHTING-IN PROCESS
 discusses and demonstrates troubleshooting procedures for difficulties encountered while sighting-in your  laser sight.

PARALLAX AND YOUR LASER SIGHT
 discusses parallax, (the slight offset between your laser sight and gun barrel), and it's effect on your laser-equipped handgun.

tips and tricks to sighting in your laser sights on your firearms. Having problems holding zero?

2018年3月20日星期二

low profile subcompact rechargeable Pistol Rail Laser - Handgun Rail Las...



Tactical Compact Green Dot Laser Sight with 20mm Rail Picatinny On/Off Switch for Air Pistol,Airgun,Modem Semi-automatic Pistols,Handgun,Shotguns,Rifle etc


 Tactical Red Compact Pistol Laser Sight Adjustable USB Rechargeable with 20mm Rail Mount Picatinny Weaver for Air Pistol Airgun Modem Semi-automatic Pistols Handgun Shotguns Rifle etc


  • ◇Compact green dot sights provide civilians and armed professionals a robust 1x aiming solution for any situation,The Picatinny interface provides standard installation options for a wide range of applications.
  • ◇Point-of-aim is point-of-impact and the green dot remains parallel to the bore of your firearm, no matter what your viewing angle is relative to the optical axis of the sight.
  • ◇The green dot sight will be brighter than any red sight during the day for visibility in all light conditions.
  • ◇Turn on the ON / OFF switch at any time to save power and prolong the use of time,The green dot sight sight can be used for up to about 40min,USB charger is included.
  • ◇USB Rechargeable green sight is extremely low profile, yet powerful, designed to fit any rail-equipped pistols including Modem Semi-automatic Pistols,handguns, rifles and shotguns. The green dot sight sight fits onto weapon withPicatinny-Weaver Accessory Rail Mount.


Features:
◇Laser class: IIIa
◇Power Output: <5mW
◇Spot diameter: 40-50mm @ 30m
◇Working Temperature: -10°C~+40°C
◇Ambidextrous On/Off Switch
◇Windage and Elevation Adjustmens
◇Fast,safe,adjustable and secure mounting to picatinny rail
◇Weight:31.5g with Batteries
◇Dimensions(in/mm): L1.9/48*W1.1/29*H1.3/33
◇Wavelengtht:532nm
◇Max Output:<5mw
◇3.6V rechargeable battery
◇Battery charger included

Product Installation
1.Loosen the mount screw and align the unit on
2.pistol rail,Position the screw in the pistol rail
3.groove and tighten it
4.Sight Adjustment

Allen wrench adjust
Windage:Use allen wrench to turn side screw clockwise and counter-clockwise to adjust.
Elevation:Use allen wrentch to turn bottom screw clockwise and counter-clockwise to adjust.

Package include:
1 x Green Dot Sight
1 x Battery Charger
1 x Allen wrench