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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!
echo
In audio signal processing and acoustics, echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is proportional to the distance of the reflecting surface from the source and the listener. Typical examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room and an empty room. A true echo is a single reflection of the sound source.
The word echo derives from the Greek ἠχώ (ēchō), itself from ἦχος (ēchos), "sound". Echo in the folk story of Greek is a mountain nymph whose ability to speak was cursed, only able to repeat the last words anyone spoke to her. Some animals use echo for location sensing and navigation, such as cetaceans (dolphins and whales) and bats.
View More On Wikipedia.org
The word echo derives from the Greek ἠχώ (ēchō), itself from ἦχος (ēchos), "sound". Echo in the folk story of Greek is a mountain nymph whose ability to speak was cursed, only able to repeat the last words anyone spoke to her. Some animals use echo for location sensing and navigation, such as cetaceans (dolphins and whales) and bats.
View More On Wikipedia.org
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SIG ECHO3 Thermal 2-12 NIB, Sealed
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- For Sale
- $2690
- Sandy
- Oregon
Price includes shipping. This is a brand new unopened ECHO3, just never got around to needing it. It’s factory sealed and hasn’t seen the light of day. Not interested in any trades right now. Thanks!- Classified Ad in Sight, Scope, & Optic Classifieds
- liamstriding
- 1913 rail 2-12 echo echo3 optic sealed sig sauer thermal
- Replies: 0
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Fostech Echo trigger
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- For Sale
- For Trade
- $350
- Vancouver
- Washington
I have a Fostech Echo Trigger for sale. I installed this and used it once. It ran great. It is clean and Like new. I do not have box but have all parts needed. I paid $425 asking $350.- Classified Ad in Part & Accessory Classifieds
- Glockmaster650
- echo fostech trigger
- Replies: 1
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SIG Sauer ECHO3 1-6x23 Thermal
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- For Sale
- $2800
- Portland
- Oregon
New in box, never mounted or used. Comes with everything as new from factory. Needing to sell, not looking for trades. Cash, Apple Pay works best; I’m willing to ship if the buyer pays for shipping cost.- Classified Ad in Sight, Scope, & Optic Classifieds
- liamstriding
- echo night optic reflex rifle sig sauer target thermal vision
- Replies: 0
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Stihl, Husqvarna, or Echo Chainsaw?
I'm looking at buying a new chainsaw and want at least an 18" maybe 20" bar. I'm at looking $350/$400 for a new one. Which brand/model would you get? I don't cut up cord after cord, but I will soon be faced with a lot of 10"/12" oak tree limbs resulting from pruning, plus this winter I'll be...- Discussion Thread in Off Topic
- MannyGlocks
- chainsaw echo
- Replies: 66
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Fostech echo sport binary trigger for $269
For those of you who have been looking at binary triggers, the Fostech echo II is around $400 and franklin armory's is also expensive. Doubletap has one for around $200 but I have heard it has a heavy trigger pull (no personal experience). The Fostech echo sport is a cheaper version that uses...- Classified Ad in Great Deals
- ilikegunspdx
- binary binary trigger echo fostech sport trigger
- Replies: 1
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Gen 2 echo dot
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- For Sale
- $25
- Newport
- Oregon
I have a brand new unopened gen 2 echo dot. It was a gift but we dont really want it. $25 dollars local pick up or $30 to cover shipping.- Classified Ad in Non-Firearm Item Classifieds
- PistolHoarder
- dot echo for sale oregon
- Replies: 0
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WTS WA Amazon Echo Dot v2 White BNIW
Brand new Echo Dot personal assistant from Amazon. Asking $25 shipped. PayPal F&F preferred. Thanks for looking.- Classified Ad in Non-Firearm Item Classifieds
- bababoris
- amazon dot echo for sale washington white
- Replies: 0
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WTS OR Del-Ton Echo 308 - AR10
Excellent Condition Del-Ton Echo 308. Round count around 500 (including 3 that dropped hogs in Texas last year). Burris MTAC30 4.5-14 x42 Magpul ACS stock Cantilever mount (Cannot remember the manufacturer but it is rock solid. Original metal 20 round magazine and 2 new pmag 20s 2 boxes (-4...- Classified Ad in Rifle Classifieds
- Chase89
- ar-10 del-ton echo for sale oregon
- Replies: 2
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WTS OR Echo Ion 8wt. Fly Rod/Reel
SOLD- Classified Ad in Non-Firearm Item Classifieds
- Timbertodd
- echo
- Replies: 0
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WTB ID Trigger
Looking to purchase a used (or new if ya got it) binary/echo or the like trigger for an AR. Feel free to PM me on here as I usually drop by a few times a day. Thanks for your help! MC1- Classified Ad in Parts & Accessories Wanted
- MasterChief
- binary echo trigger
- Replies: 2
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WTS OR Echo 93 QD sling mount for AK underfolders and pistols
E93 V4/QD Quick detach sling mount for AK underfolders and some AK pistols. New in the package, check Echo 93's website for specific models that this unit fits. Look under the V4 section. $30 may be willing to trade for 9mm projectiles or 223 projectiles. Thanks for looking.- Classified Ad in Part & Accessory Classifieds
- The Courier
- echo mount pistols sling
- Replies: 0
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WTS OR FosTech Echo binary trigger
I have a FosTech Echo trigger that has less than 500 rounds on it. Retail is 480 and I am looking to sell for 400 firm. it was only used once for testing and review and is a pretty cool gadget. However. I'm in need of finances to pay some pressing bills so this is the first thing on the block...- Classified Ad in Part & Accessory Classifieds
- Mobius
- echo fostech trigger
- Replies: 1
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Oregon Fostech Echo trigger illegal in Oregon?
So I was just looking at the page on Fostech's website for their Echo trigger which fires on the pull and release. Then I noticed that they are listing Oregon as one of the states they cannot ship to. This came as a total surprise to me. Can somebody clue me in as to what law it is that makes...- Discussion Thread in Firearm Laws & Legal
- Prestantia
- echo fostech illegal law oregon trigger
- Replies: 105
