AR-15/M16 14.5 Pencil Barrel 4150 QPQ Mid .625

Name: AR-15/M16 14.5 Pencil Barrel 4150 QPQ Mid .625
Brand: Faxon Firearms
Availability: InStock

Faxon Firearms · Barrels

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Best price

$161.00at Brownells

In stock checked Oct 1, 2026

Buy at Brownells

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Where to buy

Store	Price	Availability	Buy	Add to build
Brownells Best price	$161.00checked Oct 1, 2026	In stock	Buy at Brownells
Palmetto State Armory	$178.99checked Oct 1, 2026	Check store	Buy at Palmetto State Armory

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

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Lowest in-stock price in the last 30 days: $161.00 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Brownells	$161.00	$161.00	$161.00
Palmetto State Armory	$178.99	$178.99	$178.99

Since Sep 27, 2026.

About this part

The AR-15/M16 14.5 Pencil Barrel 4150 QPQ Mid .625 is a 14.5" AR-15 barrel from Faxon Firearms with a mid-length gas system. It's sold by 2 stores (1 in stock), from $161.00 to $178.99. The lowest in-stock price in the last 30 days was $161.00 at Brownells.

Fits and works with

Gas system: Mid-length · Handguards
Gas block: 0.625" diameter · Gas blocks
Barrel length: 14.5" · Handguards

Specifications

Manufacturer: Faxon Firearms
Platform: AR-15
Barrel length: 14.5"

From the manufacturer

Faxon AR-15 5.56 Pencil barrels have a narrow O.D. both fore and aft of the gas block, for maximum weight saving. AR-15 5.56 Pencil barrels are manufactured at Faxon’s ISO-certified facility from one of the hardest materials on the planet, 4150 CMV carbon steel, featuring a QPC black Nitride coating for superior wear-resistance and longevity.

Models available for use with carbine- or mid-length gas tubes
.625" O.D. at gas shoulder accept low-profile gas block 1” long or less
Will not accept standard-length front sight block
1-8" twist rifling to stabilize the entire range of common loadings
Muzzles have ½” x 28 threads

All Faxon AR-15 5.56 Pencil barrel feature M4 feedramps for to aid in reliable chambering and extraction of round, and they must pass magnetic particle inspection to ensure consistent quality.

Big Book Catalog, Issue:71, Page:020