Join the #1 community for gun owners of the Northwest
We believe the 2nd Amendment is best defended through grass-roots organization, education, and advocacy centered around individual gun owners. It is our mission to encourage, organize, and support these efforts throughout Oregon, Washington, Idaho, Montana, and Wyoming.
Discuss firearms and all aspects of firearm ownership
Join others in organizing against anti-gun legislation
Buy, sell, and trade in our classified section
Find nearby gun shops, ranges, training, and other resources
Discover free outdoor shooting areas
Stay up to date on firearm-related events
Share photos and video with other members
...and much more!
Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), or 4.00 × 10−7 to 7.00 × 10−7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths). This wavelength means a frequency range of roughly 430–750 terahertz (THz).
The main source of light on Earth is the Sun. Sunlight provides the energy that green plants use to create sugars mostly in the form of starches, which release energy into the living things that digest them. This process of photosynthesis provides virtually all the energy used by living things. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight. Some species of animals generate their own light, a process called bioluminescence. For example, fireflies use light to locate mates, and vampire squids use it to hide themselves from prey.
The primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarisation, while its speed in a vacuum, 299,792,458 metres per second, is one of the fundamental constants of nature. Visible light, as with all types of electromagnetic radiation (EMR), is experimentally found to always move at this speed in a vacuum.
In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. Like all types of light, visible light is emitted and absorbed in tiny "packets" called photons and exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.
^ CIE (1987). International Lighting Vocabulary. Number 17.4. CIE, 4th edition. ISBN 978-3-900734-07-7.
By the International Lighting Vocabulary, the definition of light is: “Any radiation capable of causing a visual sensation directly.”
^ Pal, G. K.; Pal, Pravati (2001). "chapter 52". Textbook of Practical Physiology (1st ed.). Chennai: Orient Blackswan. p. 387. ISBN 978-81-250-2021-9. Retrieved 11 October 2013. The human eye has the ability to respond to all the wavelengths of light from 400–700 nm. This is called the visible part of the spectrum.
^ Buser, Pierre A.; Imbert, Michel (1992). Vision. MIT Press. p. 50. ISBN 978-0-262-02336-8. Retrieved 11 October 2013. Light is a special class of radiant energy embracing wavelengths between 400 and 700 nm (or mμ), or 4000 to 7000 Å.
^ Gregory Hallock Smith (2006). Camera lenses: from box camera to digital. SPIE Press. p. 4. ISBN 978-0-8194-6093-6.
^ Narinder Kumar (2008). Comprehensive Physics XII. Laxmi Publications. p. 1416. ISBN 978-81-7008-592-8.
Up for Trade is my BCM-URG-MID-16ELW-MCMR-15. BCM lower w/ SOPMOD Stock and Gunfighter Grip. Approximately 200 rounds fired. Looking for a good quality 9mm carry pistol with quality RDS. Let me know what you have.
New in box, never mounted Cloud Defensive Indiana Moonshine REIN Complete Kit weapon light
This is their "too drunk to care" "Moonshine" REIN light kit. The color of the individual parts of the light are random.
This is not a "blem" kit, it just has randomized colors (see picture).
Hey everyone! Selling my Kel-Tech Sub-2000 gen 1. This is the Glock G19 frame version, so it has the shorter grip. I have a few magazines that I can include with the sale. Round count is only 125. I can post some photos later or send them if you are interested.
It is a fun gun and a nice thing...
$100, excellent condition
Meet at Mazama in Eugene.
Will ship, buyer responsible for shipping.
Features of Streamlight TLR-7A Flex Tactical Weapon Light
Custom optic produces a concentrated beam with optimum peripheral illumination
Ambidextrous on/off switch
Uses one CR123A lithium battery...
I currently have an optic on my AR and a pistol mounted light on my side arm that take CR2 batteries. I want to add a light to my AR that takes CR2 batteries "M-loc mounted preferred" but I'm having trouble finding one.
My budget is around $150 and I am running this on a 12" pistol so...
Amazon Listing: https://www.amazon.com/gp/product/B07MS7G7RZ?sa-no-redirect=1&pldnSite=1&th=1
USB Charging cable
Never mounted while shooting, it was on my nightstand gun
Up for sale is my beretta m9a3 in fde like new with extras.
Included in sale-
-handgun with factory box and all paperwork / accessories
-6 mags (five beretta sandproof mags, and one extended mag)
-Safariland duty holster
Possible trades but prefer cash
I have a couple of m38 mosins, a couple of swiss rifles, a 7.7 jap and 303 brit rifle. I found some 32cal (.313 dia about 100gr weight) cast bullets for a decent price. I would powder coat these before loading. Has anybody had any luck getting this light of a bullet to shoot accurately enough to...
This is new condition
Nice old Surefire item I don’t see often
Has everything it comes with from the factory
Both instruction manuals
2 new lamp assembly’s one being brighter
The sticky backers to cover the grip unpeeled
Uses a dual throw lever picatinny arms mount
They make some nice modern...
Have for sale or trade a 10.5” upper in 5.56 and a cloud defense OWL weapon light.
-ripcord insustries LDR1 handguard
-aero gas block
-aero melonite gas tube
-a2 birdcage flash hider
OWL weapon light
Looking at $400obo for...
Both like New
Tlr6 for sig p365x/p365xl/p365
Apocalypse holster Co
Zombie green light bearing 365x/365
Holster iwb right hand
Trade for 9mm ammo 150 rounds boxed brass.
Or $80 firm cash local pick up only
Looking for a light weight budget scope. About the only thing I can find is a vortex crossfire 2 or diamondback 2-7x32. The issue is they come in at 14oz, so at that point I should just get vortex 3-9x40.
Any recommendations? Open to other brands, vortex is just what I have found so far to be...