The Gamo 650NM Red Laser Sight is an inexpensive laser sight available at our local Wal-mart store. We have seen it on display for $12, but it when we checkout, it rings up close to $17, which is similar to Amazon's price. At that price, it makes this laser sight the most affordable laser sight for airsoft wars.
The Gamo 650NM Red Laser Sight comes in a sealed transparent package (see photo below). The easiest way to get the laser sight out is to cut into it with a hobby knife.
The back of the package claims that this laser sight can be mounted to .22 rifles. My guess is the laser sight can handle recoil up to at least a .22 caliber gun. It also says "shockproof". So, we wonder if it is useful on a stronger gun.
The package contains the Gamo laser sight, a remote trigger switch, a dove tail mounting bracket, a Picatinny weaver mounting bracket, two allen wrenches, velcro tape, two AG13 (LR44) button cell batteries, and instruction manual.
Unlike other red laser sights, which uses three button cell batteries (4.5 volts total), the Gamo 650NM Red Laser Sight only uses two AG13 button cell batteries (3 volts total). That's potentially quite a bit of saving over the long run.
The batteries comes lose in the package. You have to install them yourselves. They are rather easy to install. The battery cover are tight, meaning you won't be loosing it on the field. But with a bit of pressure, it comes off. Installing the two batteries is a breeze.
The hard part is to replace them in the future. There is no way to grip the button cells with your fingers. I had to use a hobby knife to pry the batteries out.
The laser sight shell is made out of plastic. But it seems to be a very sturdy type of hard ABS plastic. Holding it in my hand, it provide high confidence that it will do the job.
The remote switch that comes with the Gamo 650NM Red Laser Sight is one of a kind compared to other laser sights in this range. It has a power connector (see photo below), rather than replacing the battery cap like other laser sights. Therefore, it's very easy and quick to switch between the on-board switch vs. the remote switch.
One more interesting observation... When the remote switch is connected, the on-board switch is disabled. It would have been better if the on-board switch is left intact so that both switch can be used. At this time, to use the on-board switch in the field, you'll have to take an extra step to disconnect the remote switch.
The Gamo 650NM Red Laser Sight comes with two different mounts. One mount is for dove tail rails that are on most airguns. The other mount is for Picatinny weaver rails that are on most military and law enforcement firearms. The second mount is excellent for airsoft weapons.
Each of the mounts is rather simple. Each composes of two simple metal brackets tied together by two hex screws. Because each set is two independent metal brackets, mounting the laser sight onto the gun is slightly more difficult than many other laser sights we've tried. But they do work.
The photo above shows the Gamo 650NM Red Laser Sight mounted to the Colt 1911 Target airsoft gun via the Picatinny weaver mount. The distance of the laser sight to the handgrip is so short we found that it is unnecessary to use the remote trigger on the pistol. The toggle switch is more than sufficient on a pistol.
There is a screw under one of the logo sticker that partially came off (see photo below). However, it's not clear whether it is possible to fullydisassemble this laser sight. Even though the plastic laser sight is assembled in a clamshell, it seems to be glued together in various points.
After unscrewing the screw, the clamshell comes apart. You can only access the rear portion of the laser sight, which includes wiring and the mechanical switch.
the front portion of the laser sight is glued together. It's not possible to take the front apart to gain access to the laser diode without cutting into the shell.