Radical Firearms 18" .223 Wylde 1:8 Rifle Length SPR Complete Upper - 15" M-LOK FCR Gen3 Rail and Zero Impulse Brake

Manufactured by Radical Firearms
SKU: CFU18-223SS-15FCR3-ZS
Manufactured by Radical Firearms
2 Reviews

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NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



The Radical Firearms 18" .223 Wylde Complete Upper Receiver is a match grade, drop-in solution for your next AR build. Crafted with quality materials and covered by Radical’s lifetime warranty, this MIL-SPEC upper receiver provides an outstanding solution for any budget. Arrives at your door with the hard work done. Complete the build with your favorite lower receiver and sights then head for the range!

Includes the Radical Firearms FCR System, an ultralight, slim handguard that boasts maximum weight savings without sacrificing any mounting options. Mount your favorite optics, sights, or accessories using the seamless MIL-SPEC Picatinny rail or M-LOK mounting points. This freefloat design offers the ultimate control for tactical, competition, or sporting applications.

  • 18" 416R stainless steel, hand lapped, match grade barrel
  • Chambered in .223 Wylde with a 1:8 twist rate
  • M16 cut bolt carrier group with Melonite finish
  • BCG high pressure tested and magnetic particle inspected
  • Standard charging handle
  • Radical Firearms Zero Impulse 3-Port Muzzle Brake
  • 15" Radical Firearms M-LOK FCR Rail
  • Gen 3 rail mounting system
  • Made in the U.S.A. in Stafford, Texas!
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Barrel Length18
Barrel Material416R Stainless Steel
BrandRadical Firearms
Caliber Gauge.223 Wylde
Gas System LengthRifle
Gas System TypeDirect Impingement
Handguard15 in Radical M-LOK FCR Rail
Muzzle DeviceRadical Firearms Zero Impulse Muzzle Brake
Twist Rate1:8

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

2 reviews

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Under gassed and how to fix

by -

This set up is sub moa all the way but had issues with feeding rounds sometimes and would never lock back on on empty mag this is how you fix the problem its under gassed so remove the gas block drill the gas hole to 7/64 then put on a adjustable gas block then adjust the gas block until the gun performs like it should then you will have a great upper. I sent radical arms a email on this issue they never bothered to email me back

Under gassed and how to fix

by -

Put together nice very accurate but under gassed will not feed ammo half the time and will never hold back bolt after last round try this drill the gas hole to 7/64 add adjustable gas block and then you will have a great upper