FAXON ION-X HYPERLITE 16" 5.56 AR15 RIFLE

4.93 LBS

Complete rifle weight. Sub-5-lb handling from the factory, no parts list required.

X-TRA LITE RECEIVERS

7075-T6 forged, skeletonized rail and magwell, deleted forward assist, honed bore, trued by Faxon. .96 lb as a set.

TUNED TO RUN

14-position adjustable gas block, lightweight BCG, and a match trigger — every rifle test-fired and gas-tuned before shipping.

SUPPRESSOR READY

1/2x28 threads, 14-position gas, and a brake that clears the gas block. Built to pair with the 7.84 oz Harmonix® ION 5.56.

X-Tra Lite Forged Receiver Set

7075-T6 forged aluminum, Type III hardcoat anodize, tensioning screw. Skeletonized Picatinny rail with engraved T-marks, deleted forward assist, “X” logo milling on the upper, skeletonized “X” magwell. .96 lb with dust cover.

16" 5.56 NATO Duty Series Pencil Barrel ›

4150 CMV, stress-relieved, button rifled 1:8, black nitride inside and out, mid-length gas, .625" gas journal, M4 extension, 11° target crown, 1/2x28 threads. MPI inspected and headspace checked. About 1.20 lb — the single biggest contributor to the rifle’s weight.

Slim .620" 3-Port Muzzle Brake ›

Steel, QPQ nitride, three ports that redirect gas to cut recoil and muzzle rise. At .620" OD, 2.125" long, and 1.12 oz, it clears the gas block and barrel nut, so either can come off for service without pulling the brake.

13" Carbon Fiber M-LOK® Handguard

High strength at a fraction of the weight of comparable aluminum handguards. M-LOK slots for lights, hand stops, and bipods.

Gunner Lightweight M16 BCG

Reduced reciprocating mass with Faxon Superfinish for smoother cycling and less felt movement in the rifle during recoil.

Faxon Patented Adjustable .625" Low Profile Gas Block ›

14 tactile settings from fully open to closed, adjusted with a 3/32" Allen key or flathead. Patented anti-fouling design keeps the adjustment screw out of the gas-port carbon path. 1" long, three set screws, sits under the carbon fiber handguard. Mid-length stainless gas tube.

Faxon Enhanced Match Trigger by Schmid®

Crisp, consistent break for confident shot placement at competition or training pace.

Controls & Furniture

Ambidextrous charging handle, ambidextrous safety selector, MFT Minimalist stock (or similar ultralight), B5 grip (or similar), carbine buffer system tuned to the ION-X gas profile.

Trued by Faxon. Every set is trued in-house, with tighter tolerance on the lugs for a better upper-to-lower fit.

Honed inner bore. Smooths the bolt carrier’s travel through the upper.

Deleted forward assist. Material removed where it isn’t needed.

Skeletonized rail, magwell, and “X” milling. Engraved T-marks stay visible after any coating.

Competition & Action Shooting

Sub-5-lb weight, a brake that flattens the muzzle, and a match trigger make for fast transitions, quick splits, and confident hits at speed.

Training & High Round Counts

Tuned gas and lightweight reciprocating mass keep the rifle smooth and easy to drive through long sessions and instructor days.

Defensive & Patrol

Ultralight handling in tight spaces and over extended carry, with the X-Tra Lite receiver set keeping mass to a minimum.

ION Rifle • ION Suppressor

Pair It with the Harmonix® ION 5.56

The ION-X was built to be suppressed, and the suppressor built for it shares the name. The Harmonix® ION 5.56 is a 3D-printed monolithic Grade 5 titanium can that weighs 7.84 oz and measures 6.75" — light enough that it doesn’t undo what the rest of the rifle worked for. It ships with a 1/2x28 direct-thread HUB adapter that spins straight onto the ION-X barrel once the brake comes off. Same proprietary baffle geometry as the Harmonix® Sentry, at half the weight.

Then use the 14-position gas block to dial the rifle back down. A 4.93 lb rifle with an 8 oz can on the muzzle is still lighter than most unsuppressed carbines. If you’d rather keep the brake and go quick-detach, run a MuzzLok® Plan B mount instead.

HARMONIX® ION 5.56

Weight: 7.84 oz (no mount)

Length: 6.75"

Material: Grade 5 titanium, monolithic

Mount: 1/2x28 direct-thread HUB (included)

Rated: 5.56 NATO, .223 Rem, .224 Valkyrie, .22 Nosler

Thermal limit: 800°F. Handles short bursts; not rated for sustained full-auto.

MSRP: $975

4.93 pounds as a complete rifle, with stock, grip, handguard, and muzzle brake installed. That is the finished weight, not a stripped upper-and-lower figure.

It is the same 7075-T6 forged aluminum as Faxon’s standard receivers, refined for mass reduction: skeletonized Picatinny rail with engraved T-marks, deleted forward assist, “X” logo milling on the upper, and a skeletonized “X” magwell. The set weighs .96 pounds with the ejection port cover, about 2.08 ounces lighter than the standard forged set. It is trued by Faxon with a honed inner bore for smoother BCG travel and tighter lug tolerances for upper-to-lower fit, and finished in Type III hardcoat anodize.

Pencil profile barrels were developed for the M16A1 because they offer the best balance of weight and accuracy for general-purpose use. On the ION-X the pencil profile is the single biggest contributor to the sub-5-lb weight, and Faxon’s process control keeps the bore concentric and the harmonics consistent. The ION-X barrel is 4150 CMV, button rifled 1:8, nitrided inside and out, MPI inspected, and about 1.20 lb. It handles like a carbine and shoots like a 16" build.

The brake’s slim profile clears the gas block and barrel nut, so you can remove either one for cleaning, swapping, or service without first removing the muzzle device. That saves time and keeps your brake timing intact. It also makes the brake pin-and-weld friendly on shorter barrels, since the rest of the upper stays serviceable after a permanent install.

Yes. The barrel is chambered in 5.56 NATO, which safely supports both 5.56 NATO and .223 Remington ammunition.

Yes. The 1/2x28 threaded muzzle accepts industry-standard 5.56 suppressors and mounts; remove the slim 3-port brake and install a HUB-compatible mount or a direct-thread suppressor. The natural pairing is the Harmonix® ION 5.56: 7.84 oz Grade 5 titanium, 6.75", and it ships with a 1/2x28 direct-thread HUB adapter. The Faxon patented adjustable gas block has 14 tactile settings from fully open to closed, adjusted with a 3/32" Allen key or flathead through the handguard, so you can tune cycling for suppressed use, manage gas to the shooter, and reduce wear on the rifle. Its anti-fouling design keeps the adjustment screw clear of gas-port carbon, so the settings keep working after high round counts.

Yes. Every ION-X is individually test-fired and gas-tuned with factory-new 55gr 5.56 NATO ammunition before it leaves the facility.

The ION-X cannot be shipped to CA, CT, DC, HI, IL, MD, MA, NJ, or NY due to state restrictions on AR-style rifles. All other states ship to a licensed FFL dealer, where you complete a Form 4473 to take possession.

The ION-X is machined and assembled in-house by Faxon Firearms in Greater Cincinnati, Ohio, USA. Faxon is a family-owned, ISO 9001:2015 certified, federally licensed firearms manufacturer founded in 2012, with family manufacturing roots dating to 1978 in aerospace, defense, and industrial work. Every ION-X is covered by Faxon’s Lifetime Guarantee.