FAXON ENHANCED FORGED BIG BORE AR15 UPPER RECEIVER - STRIPPED W/COMPLETION KIT

Faxon

SKU:

UR-FAX-F-A-C-BB

UPC:

810209951702

Availability:

Usually ships within 2 business days when available.

$125.00

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Current Stock:

Description

AR15 Upper Receivers › Stripped Upper Receivers › Enhanced Forged Big Bore AR-15 Upper Receiver with Completion Kit

AR-15 Upper Receiver • 7075-T6 Forged • With Completion Kit

Faxon Enhanced Forged Big Bore AR-15 Upper Receiver with Completion Kit

SKU: UR-FAX-F-A-C-BB

Faxon’s Big Bore upper is the Enhanced Forged receiver with the feed ramps and ejection port opened up for big straight-wall cases. It’s required for Faxon’s .450 Bushmaster and .458 SOCOM barrels and recommended for 350 Legend and 400 Legend, and it keeps every Enhanced feature: trued, honed bore, tighter lug tolerance, engraved T-marks, and the skeletonized shell deflector. This version includes the completion kit: forward assist and ejection port cover assemblies, shipped unassembled.

7075-T6 FORGED

Forged aluminum, Type III hard coat anodized, flat-top Picatinny rail.

THREADS GAUGED

Barrel threads (1.250-18 UNEF) checked on every receiver; CMM-checked every shift.

BIG BORE RAMPS + PORT

Ramps and ejection port opened up for .450 BM, .458 SOCOM, 350 and 400 Legend.

COMPLETION KIT

Forward assist and ejection port cover included, unassembled.

MSRP $125 • Made by Faxon in Greater Cincinnati, Ohio • Faxon Lifetime Guarantee • No FFL required

What Makes It Different

Big Bore feed ramps and ejection port: Opened up for .450 Bushmaster, .458 SOCOM, 350 Legend, and 400 Legend cases
Trued by Faxon at the factory
Inside bore honed to smooth the bolt carrier’s travel
Tighter tolerance on the barrel-extension lugs for a better fit
Manually engraved T-marks that stay visible after any coating
Skeletonized (hollowed) shell deflector: lighter, and the Faxon look
Faxon logo engraving

Which Faxon Upper Receiver Do You Need?

Receiver	What it is	MSRP
Forged, stripped	Plain-sided forging; no engraving, T-marks, or skeletonized deflector	$89
Forged, with completion kit	Same, plus forward assist and port cover	$115
Enhanced Forged, stripped	Trued, honed bore, tighter lugs, engraved T-marks, skeletonized deflector	$99.99
Enhanced Forged, with completion kit	Same, plus forward assist and port cover	$125
338 ARC Enhanced, with completion kit	Feed ramps cut for 338 ARC; recommended for Faxon 338 ARC barrels	$125
Big Bore Enhanced, with completion kit (this receiver)	Big-bore ramps and port; required for .450 BM and .458 SOCOM, recommended for 350/400 Legend	$125

Don’t want to build it? Faxon sells this receiver already built into complete uppers and barreled uppers, with Faxon barrels, gas systems, and handguards installed.

Specifications

Material	7075-T6 forged aluminum
Finish	Type III hard coat anodizing
Barrel thread	1.250-18 UNEF, gauged on every receiver
Top rail	Flat-top Picatinny
Caliber compatibility	Big-bore AR-15 cartridges: required for .450 Bushmaster and .458 SOCOM, recommended for 350 Legend and 400 Legend
Included	Forward assist and ejection port cover assemblies (unassembled)
Made in	Greater Cincinnati, Ohio, USA
Warranty	Faxon Lifetime Guarantee

Fitment

Lower receiver	Any mil-spec AR-15 lower; Faxon lowers include a tensioning screw
Barrels	Mil-spec AR-15 barrels and barrel nuts
Handguards	Free-float handguards with a mil-spec upper interface
FFL	Not required; the upper isn’t the serialized part

What Reviewers and Owners Say

OPTICSPLANET

Faxon Forged Upper Receiver Reviews ›

Verified buyer on Faxon’s forged 7075-T6 upper.

“The quality and craftsmanship is exceptional.”

“considering it is factory trued, makes a good investment.”

Tom, Enhanced Forged upper, FaxonFirearms.com

“Solid bond between upper and lower.”

MCT, Enhanced Forged upper, FaxonFirearms.com

“Fit & finish were impeccable. The cutouts in the brass deflector are designed to cut weight, but they also add a great custom look to your gun.”

Charles Adkins, Enhanced Forged upper, FaxonFirearms.com

Average rating on FaxonFirearms.com: 4.9 out of 5 stars (Enhanced Forged upper). The Big Bore upper is new, so these reviews are for the standard Enhanced upper it’s built from.

Enhanced Forged Big Bore AR-15 Upper Receiver with Completion Kit FAQs

What’s a stripped upper receiver?

The upper receiver alone, with no barrel, bolt carrier group, charging handle, or handguard. This version adds the completion kit: forward assist and ejection port cover assemblies, shipped unassembled.

Forged or billet: does it matter?

For a mil-spec AR-15 upper, a 7075-T6 forging is the proven standard: strong, consistent, and compatible. Billet receivers can offer unique shapes, but no functional advantage on their own. Faxon’s uppers start as 7075-T6 forgings and are machined and inspected in Greater Cincinnati.

Will it fit my lower?

Yes, any mil-spec AR-15 lower. Faxon lowers include an upper-to-lower tensioning screw to take out play.

Does it need an FFL?

No. On an AR-15, the lower receiver is the serialized part; the upper ships directly to you. State and local laws still apply.

Which cartridges need the Big Bore upper?

.450 Bushmaster and .458 SOCOM require it on Faxon barrels. It’s recommended for 350 Legend and 400 Legend. Standard intermediate cartridges run in Faxon’s regular Enhanced upper.

What are T-marks for?

They’re reference marks on the top rail that make it easy to put an optic back in the same spot. Faxon engraves them, so they stay visible after any coating.

Where is it made, and what is the warranty?

Faxon machines and inspects its upper receivers in Greater Cincinnati, Ohio, and backs them with the Faxon Lifetime Guarantee.

Warranty

Faxon Lifetime Guarantee. Covers manufacturing and material defects to the original purchaser. Excludes damage from misuse, neglect, non-standard ammunition, or modifications. Register your product at faxonfirearms.com/product-registration to expedite service. For purchases through dealers or distributors, warranty repairs are handled directly by Faxon Firearms; refunds must be processed through the selling entity. Full policy: faxonfirearms.com/warranty-privacy-terms/