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FAXON DUTY SERIES 10.5" SOCOM 5.56 COMPLETE UPPER - SUPPRESSOR READY
Faxon
$866.00
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Faxon
FAXON DUTY SERIES 10.5" SOCOM 5.56 COMPLETE UPPER - SUPPRESSOR READY
FAXON DUTY SERIES 10.5" SOCOM 5.56 COMPLETE UPPER - SUPPRESSOR READY
Compact suppressed performance ready to run — heavy SOCOM contour barrel for excellent heat control and sustained accuracy, carbine-length gas system tuned with Faxon’s patented adjustable low-profile gas block for perfect suppressor/unsuppressed cycling, 1:8 twist, MuzzLok® Plan B flash hider for repeatable timing and fast HUB-mount suppressor attachment, superfinished nitride BCG, and mil-spec charging handle — drop-in ready for AR pistols and SBRs. Made in Greater Cincinnati, Ohio.
5.56 NATO • Duty/Tactical 10.5" SOCOM Profile Duty Series 4150 CMV Black Nitride QPQ 1:8 Twist Carbine Gas + Adjustable GB MuzzLok® Plan B Suppressor Ready Complete w/ BCG & CH Made in Ohio, USA
What it is
The Faxon Duty Series 10.5" SOCOM 5.56 Complete Upper - Suppressor Ready is a fully assembled, drop-in ready upper optimized for compact AR-15 pistols, braced builds, and short-barreled rifles in tactical, duty, and suppressed roles. The heavy SOCOM profile adds forward mass to manage heat, reduce mirage, and maintain tight groups during rapid or sustained fire — crucial for short barrels that heat up fast, especially under suppression.
Core is Faxon’s in-house button-rifled Duty Series 4150 CrMoV barrel (1:8 twist, stress-relieved, MPI-inspected, black nitride finish) paired with a carbine-length gas system and Faxon’s **patented adjustable .750" low-profile gas block** for precise tuning (suppressed vs. unsuppressed). It ships with Faxon’s premium MuzzLok® Plan B flash hider (1/2×28, .250" bore, stainless nitride) for effective flash hiding, rock-solid repeatable timing (no shims), and direct HUB-mount suppressor compatibility. Includes superfinished nitride M16 BCG and mil-spec charging handle — ready to mount to your lower and go.
Tough, tunable, and suppressor-optimized — the complete short-barrel upper for operators who need compact power with seamless can integration and perfect gas regulation.
Who it’s for / not for
- Best for: Suppressed AR pistols, SBR/PDW builds, close-quarters tactical, vehicle defense, high-volume training with quick suppressor swaps and minimal POI shift.
- Good match: Mil-spec AR-15 lowers, HUB/Plan B suppressors (Faxon HARMONIX®/CORESYNC® etc.), red-dot/holographic optics, braced or registered SBR platforms.
- Not ideal for: Long-range precision (consider 16"+ barrels), ultralight competition, or fixed gas block preference.
Key features
- 10.5" SOCOM Profile Barrel — heavy contour excels at heat dissipation, mirage reduction, and accuracy under rapid fire
- 4150 CrMoV Steel • Black Nitride — battle-proven longevity, corrosion resistance, easy cleaning
- 1:8 Twist Rate — stabilizes common 55–77 gr 5.56 loads effectively
- Carbine-Length Gas + Patented Adjustable Gas Block — tunable for suppressed/unsuppressed use, perfect cycling in short barrels
- MuzzLok® Plan B Flash Hider — flash reduction + HUB suppressor compatibility with repeatable, shim-free timing
- Superfinished Nitride M16 BCG + mil-spec charging handle included
- Made in Greater Cincinnati, Ohio — core components manufactured & upper assembled by Faxon Firearms
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)
Use these links to verify compatibility, plan upgrades, or source spare parts.
| Component | Faxon Part |
|---|---|
| Upper Receiver | FAXON ENHANCED FORGED AR15 UPPER RECEIVER - STRIPPED W/COMPLETION KIT |
| Barrel | FAXON DUTY SERIES SOCOM PROFILE 10.5" CARBINE-LENGTH 5.56 NATO AR15 BARREL |
| Muzzle Device | FAXON MUZZLOK® STAINLESS STEEL PLAN B FLASH HIDER 1/2X28 - .250" BORE |
| Handguard | FAXON STREAMLINE ALUMINUM M-LOK 9" AR15 HANDGUARD |
| Gas Block | FAXON PATENTED ADJUSTABLE .750" 3 SCREW LOW PROFILE GAS BLOCK |
| Gas Tube | FAXON CARBINE LENGTH STAINLESS STEEL AR GAS TUBE |
| Bolt Carrier Group | FAXON SUPERFINISHED 5.56 M16 BOLT CARRIER GROUP - NITRIDE |
| Charging Handle | Mil-Spec |
Quick specs summary: Complete 10.5" 5.56 NATO Duty Series SOCOM-profile upper — 4150 CMV black nitride barrel, 1:8 twist, carbine-length gas with patented adjustable gas block, MuzzLok® Plan B flash hider (1/2×28, .250" bore), Streamline 9" M-LOK handguard, superfinished nitride BCG, mil-spec charging handle. Suppressor-ready and tunable for compact tactical, duty, and high-volume use. Made by Faxon Firearms in Greater Cincinnati, Ohio.
FAQs
Will this upper work on any standard AR-15 lower?▾
Yes — completely compatible with any mil-spec AR-15 lower receiver. Just attach and you're ready to shoot.
Is this upper suppressor ready?▾
Yes — fully optimized for suppression. Ships with Faxon MuzzLok® Plan B flash hider (1/2×28, .250" bore) for direct HUB-mount suppressor compatibility and the patented adjustable gas block for perfect tuning (suppressed vs. unsuppressed). Timing nut ensures repeatable POI with minimal shift when removing/reinstalling the can.
What does the adjustable gas block do?▾
Faxon’s patented adjustable low-profile gas block allows precise gas flow tuning, ensuring reliable cycling and reduced recoil whether running suppressed or unsuppressed — ideal for short-barrel builds where gas dynamics vary significantly with a can.
What does the SOCOM profile do for a 10.5" barrel?▾
The heavier contour dramatically improves heat management and reduces mirage compared to lightweight profiles, helping maintain accuracy and point of impact during rapid or prolonged fire — especially valuable on short barrels that run hot quickly under suppression.
What BCG is included?▾
Faxon’s superfinished nitride M16 BCG — smooth cycling, high durability, and excellent for high-round-count use.
What warranty covers this upper?▾
Faxon Firearms Limited Lifetime Warranty. Full details, terms, and service information available at:
https://faxonfirearms.com/warranty-privacy-terms/
- Caliber:
- 5.56 NATO
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