AR-15 M4E1-T 14.5 Upper Build Kit 5.56mm

Name: AR-15 M4E1-T 14.5 Upper Build Kit 5.56mm
Brand: Brownells
Availability: OutOfStock

Brownells · Upper Receiver

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Best price

$823.59at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$823.59checked Oct 1, 2026	Out of stock	Buy at Brownells

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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Dashed line = out of stock. Tracking since Sep 28, 2026.

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Store	Latest	Lowest	Highest
Brownells	$823.59	$823.59	$823.59

Since Sep 28, 2026.

About this part

The AR-15 M4E1-T 14.5 Upper Build Kit 5.56mm is a 5.56 / .223 upper receiver from Brownells. One store lists it, Brownells at $823.59.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups

Specifications

Manufacturer: Brownells
Platform: AR-15
Caliber: 5.56 mm NATO

From the manufacturer

M4E1 Threaded Upper Receiver Features a new enhanced forging that gives the upper receiver a ""billet look"". The new picatinny profile that blends seamlessly with the Aero Enhanced R-Series Handguards. The receivers feature M4 Feedramps .250 takedown pin holes, Laser engraved T-marks, and includes port door and forward assist installed. The Brownells M16 5.56 Complete Bolt Carrier Group is constructed with a bolt made from 9310 steel, which is finished with a heat treatment and shot peening. The carrier is fabricated from 8620 hardened steel. Each element of the bolt-carrier group is finished in a black-nitride coating. The Brownells M16 5.56 Complete Bolt Carri Mfg: Brownells