Faxon Ion Ultralight Modern Sporting Rifle (FX5500)

(2 reviews)
Current Stock:


Faxon Firearms has long been known for bringing quality and value to our customers when it comes to purchasing parts for their rifle builds. Faxon is taking things to the next level and bringing that same quality and value to the modern sporting rifle market.

Backed by the Faxon Lifetime Guarantee, our rifles fall into two distinct groups; the First Line and the Summit Line. Are you a first-time buyer, or in search of a value priced rifle offering? Check out the First Line. Looking for a more specialized rifle configuration for competition, training, or defensive use? The Summit Line is for you!

The Faxon Ion Rifle is the most affordable production ultralight AR15 on the market. Weighing in at just under 5 lbs, the Ion Ultralight AR15 is the perfect choice for any customer looking to step into the competition world, or for those who just enjoy the soft recoil of a finely tuned lightweight rifle. As part of Faxon's Summit Line, the Ion comes from the factory with a whole slew of out-of-the-box upgrades, including a tuned gas system, Gunner lightweight bolt carrier group,  ambi charging handle & safety selector, Hiperfire EDTDM trigger, and more!

Faxon's Ion Ultralight Rifle (FX5500):

  • 16" 556 Integral Barrel with 3-Port Brake - Meets NFA 16" minimum barrel length requirement 
  • Enhanced Forged Receiver Set w/ Tensioning Screw
  • Gunner Lightweight BCG w/ Superfinish
  • 13" M-LOK Carbon Fiber Handguard
  • Multi Position Adjustable Gas Block
  • Hiperfire EDTDM Single Stage Trigger
  • Ambi Charging Handle 
  • Radian Talon Ambi 45/90 Degree Safety Selector
  • MFT Minimalist Stock or similar
  • Magpul MOE® Grip or similar
  • Mid Length Gas System

Complete Rifle Weight: 4.95 lbs

Note- Each rifle will be individually test fired & tuned with factory new 55gr 5.56 Nato ammunition. 


Click HERE for product manuals.


Note: Cannot be shipped to CA, CT, DC, HI, IL, MD, MA, NJ, or NY state



  • 5
    The best AR-15 I've shot and the star of shoot day

    Posted by David Neuhaus on May 9th 2022

    Shoot day is fun for the whole family, but there is always a few of the smaller folks like moms or wives that wish they could enjoy the 223/556 rifles. Now they can. Mothers day ended up with mom advance requesting this as her next/main shooter. Didn't think she'd ever get tired of the hitting the gongs and she's never been more accurate/consistent/fast! Light weight made it so easy for her to hold and shoot. Standing, sitting, bench and the brake made it gentle enough too.... I'll write off all the ammo as a mothers day gift ;)

  • 5

    Posted by Brett on May 5th 2022

    Fantastic AR. Lighter than you can imagine. Shoots great and groups tight. Very good fit and finish. No complaints here. Thanks Faxon for a great First Responder discount.