FAXON ION SERIES 16" INTEGRAL BRAKE PENCIL 5.56 BARRELED UPPER
Faxon
$809.00
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Faxon
FAXON ION SERIES 16" INTEGRAL BRAKE PENCIL 5.56 BARRELED UPPER
FAXON ION SERIES 16" INTEGRAL BRAKE PENCIL 5.56 BARRELED UPPER
Featherweight speed and control — 16" pencil barrel with built-in Integral® 3-port brake for reduced muzzle rise and flatter shooting, mid-length gas tuned with patented adjustable block, 1:8 twist, Salt Bath Nitride finish, ultra-light Streamline Carbon Fiber handguard — the ultimate lightweight upper built for competition, training, and fast-handling duty use. Made in Greater Cincinnati, Ohio.
5.56 NATO • Lightweight/Competition 16" Pencil Profile ION Series 4150 CMV Salt Bath Nitride 1:8 Twist Mid-Length Gas Integral® 3-Port Brake Adjustable Gas Block Carbon Fiber Handguard Made in Ohio, USA
What it is
The Faxon ION Series 16" Integral Brake Pencil 5.56 Barreled Upper is an ultra-lightweight, high-performance upper designed for shooters who demand minimal weight with maximum control and speed. The pencil profile keeps mass to an absolute minimum for lightning-fast handling, while the one-piece Integral® 3-port brake (machined directly into the barrel) dramatically reduces recoil and muzzle climb for flatter, faster follow-up shots — perfect for competition, dynamic training, defensive use, or any application where every ounce and every fraction of a second counts.
Built around Faxon’s ION Series 4150 CMV barrel (button-rifled in-house, 1:8 twist, stress-relieved, MPI-inspected, Salt Bath Nitride finish) with mid-length gas system for smooth, soft recoil. Features Faxon’s patented adjustable .625" low-profile gas block for precise tuning (suppressed/unsuppressed or ammo-specific), and the Streamline Carbon Fiber 13" M-LOK handguard for extreme weight savings and modular accessory mounting. The integral brake design delivers perfect alignment, no added length/weight, and meets 16" NFA minimum barrel length.
Engineered for speed, balance, and reliability — the ION Series upper that feels like an extension of your body.
Who it’s for / not for
- Best for: Competition shooters, dynamic training, lightweight defensive builds, hunters or hikers wanting minimal carry weight, anyone prioritizing speed and low recoil over heavy thermal mass.
- Good match: Mil-spec AR-15 lowers, red-dot or low-power variable optics, setups needing tunable gas for suppressors or varied ammo.
- Not ideal for: Sustained full-auto or extreme high-heat/full-auto use (consider SOCOM profile), benchrest precision where maximum rigidity is priority.
Key features
- 16" Pencil Profile w/ Integral® 3-Port Brake — ultra-light barrel with built-in recoil reduction and flatter shooting, no added weight or length
- 4150 CMV Steel • Salt Bath Nitride — exceptional durability, corrosion resistance, easy cleaning
- 1:8 Twist Rate — stabilizes popular 55–77 gr 5.56 loads
- Mid-Length Gas System — smoother recoil impulse, improved reliability & parts life
- Patented Adjustable .625" Gas Block — tunable for suppressed/unsuppressed use or ammo variations
- Streamline Carbon Fiber 13" M-LOK Handguard — extreme weight reduction, strong, modular accessory mounting
- Made in Greater Cincinnati, Ohio — 100% Faxon Firearms manufactured & assembled
Related shopping shortcuts
Backed by Faxon Firearms’ Limited Lifetime Warranty.
Full terms & exclusions: https://faxonfirearms.com/warranty-privacy-terms/
Bill of Materials (exact components used)
These links help buyers validate compatibility, upgrade paths, and replacement parts.
| Component | Faxon Part |
|---|---|
| Upper Receiver | FAXON ENHANCED FORGED AR15 UPPER RECEIVER - STRIPPED W/COMPLETION KIT |
| Barrel | FAXON INTEGRAL® SERIES 16" PENCIL BRAKE PROFILE MID-LENGTH 5.56 NATO AR15 BARREL |
| Muzzle Device | Integral® 3-Port Brake (machined into barrel) |
| Handguard | FAXON STREAMLINE CARBON FIBER M-LOK 13" AR15 HANDGUARD |
| Gas Block | FAXON PATENTED ADJUSTABLE .625" 3-SCREW LOW PROFILE GAS BLOCK |
| Gas Tube | FAXON MID-LENGTH STAINLESS STEEL AR GAS TUBE |
Quick specs summary: 16" 5.56 NATO ION Series Integral Brake Pencil barreled upper — 4150 CMV Salt Bath Nitride pencil barrel with built-in 3-port brake, 1:8 twist, mid-length gas with patented adjustable .625" gas block, Streamline Carbon Fiber 13" M-LOK handguard. Ultra-lightweight, low-recoil, optimized for speed and competition. Made by Faxon Firearms in Greater Cincinnati, Ohio.
FAQs
Is this compatible with standard AR-15 lower receivers?▾
Yes — completely compatible with any mil-spec AR-15 lower receiver.
What is the Integral® brake and how does it work?▾
The Integral® 3-port brake is machined as one piece with the barrel for perfect alignment, reduced recoil, and flatter shooting — no added length, weight, or alignment issues from separate devices, while still meeting 16" NFA minimum barrel length.
Where is this upper manufactured?▾
100% made in the USA — barrel, machining, and final assembly all performed by Faxon Firearms in Greater Cincinnati, Ohio.
What makes the ION Series different?▾
ION Series focuses on ultra-lightweight performance with premium components (carbon fiber handguard, integral brake, adjustable gas block) for maximum speed and balance without sacrificing reliability — ideal for competition, dynamic training, or lightweight defensive use.
What’s the advantage of the pencil profile?▾
The slim pencil contour dramatically reduces weight for faster handling, easier carry, and quicker transitions — perfect for competition or any application where every ounce matters, while still delivering good velocity and harmonics.
Does this include BCG and charging handle?▾
No — this is a complete barreled upper only. You will need to add a bolt carrier group and charging handle (see related shopping links above).
What warranty covers this upper?▾
Faxon Firearms Limited Lifetime Warranty. Full details, terms, and service information available at:
https://faxonfirearms.com/warranty-privacy-terms/
All Faxon Firearms products are backed by our Limited Lifetime Warranty.
For full warranty terms, service instructions, and exclusions, please visit:
https://faxonfirearms.com/warranty-privacy-terms/
- Caliber:
- 5.56 NATO
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