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radian

The radian is the standard unit of angular measure, used in many areas of mathematics. The length of an arc of a unit circle is numerically equal to the measurement in radians of the angle that it subtends; one radian is just under 57.3 degrees (expansion at A072097). The unit was formerly an SI supplementary unit, but this category was abolished in 1995 and the radian is now considered an SI derived unit.
Separately, the SI unit of solid angle measurement is the steradian.
The radian is represented by the symbol rad. An alternative symbol is c, the superscript letter c (for "circular measure"), the letter r, or a superscript R, but these symbols are infrequently used as it can be easily mistaken for a degree symbol (°) or a radius (r). So, for example, a value of 1.2 radians could be written as 1.2 rad, 1.2 r, 1.2rad, or 1.2c, or 1.2R.

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Recent contents
  1. gbro

    Radian Compressor for Glocks

      1. For Sale
      2. For Trade
    • $60
    • Hillsboro
    • Oregon
    Basically brand new radian compressor for Glocks. Didn’t work in my Zev OZ9, my loss your gain! Specs from Radians site: Glock® G19 Gen1-5, G19X, G45, G47 & G49 WHAT'S INCLUDED 1 - Hardened 17-4 SS Guide Rod 3 - Flat wire Springs in 13lb, 15lb, and 18 lb weights 1 - SS Washer for Gen3 1 –...
  2. 1775usmc

    SIG P320 FCU with Agency trigger

      1. For Sale
      2. For Trade
    • $200
    • Tualatin
    • Oregon
    SIG P320 FCU with an Agency tabbed/safety trigger. I'll also include the original trigger. Agency trigger was $160 alone. Transfer is on the buyer. Unless the trade makes it so I am willing to cover it. Case is included. First one with cash gets it. No holds. Price is firm. Trade for (+ cash...
  3. el1

    Glock 19 Gen5 MOS + Extras

      1. For Sale
    • $1600
    • Bellevue
    • Washington
    Putting a feeler out there, dont expect many people to bite unless you want this specific setup UNFIRED, 0 ROUND COUNT Glock 19 Gen5 (620) Radian Ramjet + Afterburner (410) Radian Compressor recoil spring (90) OEM performance trigger (90) OEM extended slide stop (15) OEM extended mag release...
  4. ImNotV3ryNinja

    G 43x ramjet+afterburner and anchor+magwell

      1. For Sale
      2. For Trade
    • $450
    • Canby
    • Oregon
    Not used still in box Black Asking 450$ for both, not wanting to split Will ship Trade interest eotech g43 magnifier
  5. W

    Geissele/BCM upper 14.5

      1. For Sale
    • $800
    • Gresham
    • Oregon
    Selling my Geissele/BCM upper. Has 400 rounds through it. Looking for $800 OBO. Send me an offer. Parts included listed below: 14.5" Geissele CHF chrome lined barrel BCM gas block and gas tube BCM upper receiver BCM bolt carrier group Geissele 13" MK16 super modular rail Radian Raptor LT...
  6. charlieboi5683

    BCM, Aero Precision and more high quality component 11.5 inch AR Pistol

      1. For Sale
    • $1300
    • Portland
    • Oregon
    BCM complete upper and BCG. Radian charging handle, aero precision lower, gieselle SDE trigger, cloud defensive light and switch, Magpul pro metal iron sights, Holosun AEMS Green, 45 degree safety. Surefire WARCOMP flash hider. Black and Gray Cerakote. Previously an SBR but unregistered it with...
  7. diddy_oil

    Radian Model 1 PDW Build

      1. For Sale
      2. For Trade
    • $1600
    • Parkdale
    • Oregon
    Radian model 1 receiver set in Radian brown, Sig Elite 9" 300blk barrel (came off m400 pistol), PWS FRC2 muzzle brake(plan b/Rearden mount), Superlative Arms adjustable gas block, Radian BCG, Radian Raptor SD, HBPDW brace, Geissele SD-C flat trigger and a Magpul K2 grip. ***Trade pending***...
  8. S

    Radian 300BLK build

      1. For Sale
    • $1600
    • Gresham
    • Oregon
    Radian 300BLK pistol build Complete Radian 300BLK Upper - never fired Aero M4E1 lower - 1k rounds •Law Folder •Radian 45/90 degree safety About $2300 into build, selling for $1600.
  9. CoolBreeze808

    Radian Raptor SD Charging Handle for AR15

      1. For Sale
    • $60
    • Portland
    • Oregon
    Has some usual wear and tear. Price is firm, not interested in trades. Meet by Mall 205 in Portland. Pay via cash, Zelle, PayPal, or CashApp. Thanks for looking!
  10. tric1911

    Aero Pro Lower w/Geissele

      1. For Sale
    • $300
    • Corvallis
    • Oregon
    Brand new Aero Pro lower, fully ambi. Never used. -Radian take down pins -Geissele hi-speed national match trigger -Irregular Defense XL Grip -Radian 45 ambi safety
  11. JmacStrong

    .300 blackout Handgun/Form1 ready build

      1. For Sale
    • $850
    • Hillsboro
    • Oregon
    Spring cleaning for the Gunsafe! This is a .300 Blackout chambered AR pistol that only needs a Muzzle device and Brace or is Form1 and Suppressor ready for a Stamped build, your choice. •The upper and lower receivers are from Oregon Rifleworks along with the dust cover with their mt hood Topo...
  12. jozguns

    Radian talon ambi safety selector black, used excellent condition.

      1. For Sale
      2. For Trade
    • $50
    • Portland
    • Oregon
    For sale/trade I have the Radian talon ambi safety selector, used excellent condition. This comes with the installation tool. This is worth $65 new, selling for $50. I take cash, venmo, or trades. If you want any other parts for your build let me know. I have lots of other ads up for...
  13. diddy_oil

    Radian model 1 300blk setup

      1. For Trade
    • Parkdale
    • Oregon
    Radian model 1 8.5" receiver set in Radian brown, Sig 9" 300blk barrel with 1/5 twist (came off m400 pistol), PWS FRC2 muzzle brake(plan b/Rearden mount), Superlative Arms adjustable gas block, Emissary handbrake mini, HBPDW brace, Geissele SD-C flat trigger and a Magpul K2 grip. I put a picture...
  14. S

    **PENDING**11.5in 5.56 SLR-B15

      1. For Sale
      2. For Trade
    • $2000
    • Albany
    • Oregon
    Ambi lower Geissele CHF barrel, gas block and gas tube. Geissele MK16 10.5 inch rail Forward control designs twin dimple dust cover PWS ratchet lock castle nut and end plate Black ordinance rain nib BCG Radian trigger Radian safety Radian charging handle Geissele buffer tube Geissele H2 buffer...
  15. 1775usmc

    Radian Ramjet & Afterburner G19.5

      1. For Sale
      2. For Trade
    • $300
    • Tualatin
    • Oregon
    Used. Radian Ramjet and Afterburner for a Gen 5 Glock 19 / 19X / 45. Comes with packaging. I'll straight trade for a PMM micro comp and barrel for a G26. That's it. I’ll ship if you cover shipping.
  16. 1775usmc

    Radian Compressor recoil spring

      1. Want to Buy
      2. Want to Trade For
    • Tualatin
    • Oregon
    Like the title says. Looking for a Radian Compressor recoils spring for a G19 Gen 5. Used is fine. Can trade mags or ammo.
  17. C

    Sig Sauer P365 Macro w/EPS Carry MRS, Radian Afterburner-Ramjet, Radian Backstrap/Magwell and 2 Mags with Radian Baseplates

      1. For Sale
    • $1300
    • Happy Valley
    • Oregon
    Selling one my EDC pistols. Sig Sauer P365 FCU Gray Guns Macro Frame Sig Sauer 3.1" Slide Radian Afterburner/Ramjet Radian Backstrap/Magwell Combo 2 x 17 round Magazines w/Radian Baseplates Holosun EPS Carry MRS Red Dot Asking $1,300.00 open to reasonable offers Was $1680 to put all together...
  18. C

    SOLD: Like New Radian Afterburner/Ramjet Bronze Glock 19/19x/45 Gen5

      1. For Sale
    • $350
    • Happy Valley
    • Oregon
    Selling a like new Radian Afterburner/Ramjet with the bronze barrel for Glock 19/19x/45 Gen5. Installed but never fired. Round count: ZERO SOLD Asking $350.00 obo
  19. MDDM

    Noveske 14.5 barrel pull

      1. For Sale
      2. For Trade
    • $300
    • Hillsboro
    • Oregon
    Rebuilding a radian receiver set into a 6 ARC and commiting to my 12.5 for 5.56. Before my 12.5 build, this was my no expenses spared build. Absolutely loved the performance, but it's now just an extra and I am cleaning house. - 14.5 CHF Afghan barrel w/ mid-length gas - Noveske labeled...
  20. Ranger Walker

    Glock 19.5 Agency Arms frame

      1. For Sale
      2. For Trade
    • $475
    • Albany
    • Oregon
    Hello, I'm selling my Glock 19 Gen 5. The frame is stippled and undercut/ledge cut by Agency Arms, no I don't have paperwork for it as I bought it used. Buyer pays fee, I'll travel all the way to Portland or further depending on the buyer. Located in Albany. Comes with 1 gen 5 15rd magazine...
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