FM-45 16 Complete Upper Receiver

Foxtrot Mike Products · Upper Receiver

Best price

$445.99at Brownells

checked Sep 30, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$445.99checked Sep 30, 2026	Check store	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.

About this part

The FM-45 16 Complete Upper Receiver is an AR-15 complete upper receiver from Foxtrot Mike Products. One store lists it, Brownells at $445.99.

Specifications

Manufacturer: Foxtrot Mike Products
Type: Complete
Platform: AR-15

From the manufacturer

The Foxtrot Mike Products .45 ACP Upper Receiver comes fully assembled and ready to drop on any pistol caliber lower receiver that uses Glock magazines. With its full-length Picatinny top rail and M-LOK compatible handguard, the Foxtrot Mike .45 ACP Upper offers plenty of mounting space for optics and other accessories.

A unique interlocking connector between the upper receiver and handguard ensures the barrel nut will not work loose over time.

Premium Melonite-finished 4150 carbone steel
Button-rifled bore, 1-10" twist
½"-36 threaded muzzle
Ambidextrous, non-reciprocating forward charging handle
Bolt/carrier unit with hard Melonite finish, too

Engineered to function reliably, no matter which manufacturers’ lower it’s mated with, the Foxtrot Mike .45 ACP Upper Receiver is forgiving enough to cycle even the most economical steel, brass, or aluminum cased ammo.

Foxtrot Mike Products FM-45 Upper Receivers are not compatible with Korean magazines.