AR-15 Upper 300BLK 16" HBAR Pistol Gas 12" Fgs Handguard

Best price

$244.99at Brownells

checked Sep 30, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$244.99checked Sep 30, 2026	Check store	Buy at Brownells

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About this part

The AR-15 Upper 300BLK 16" HBAR Pistol Gas 12" Fgs Handguard is a 16" 300 Blackout upper receiver from Radical Firearms. One store lists it, Brownells at $244.99.

Fits and works with

Caliber: 300 Blackout · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Gas system: Pistol · Handguards
Barrel length: 16" · Handguards
Handguard length: 12" · Barrels

Specifications

Manufacturer: Radical Firearms
Color: Black
Platform: AR-15
Barrel length: 16"
Length: 16

From the manufacturer

The Radical Firearms 300 Blackout HBAR 16" Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any Mil-Spec AR-15 lower receiver! This fully mil-spec compliant receiver provides a high-quality upper for any level budget or shooter. Comes complete and assembled with Forged Upper Receiver, Forward Assist, Ejection Port Door and Barrel Nut. These uppers also come installed with Radical Firearm’s FGS Free Float handguard, which features QD points at various points along its round exterior. Barrel is machined from 4150V chrome moly steel, melonited, has a 1-8 twist & is chambered in 300 Blackout. Upper & barrel feature M4 feed ramps. A2 flash hider is attached via 5/8-24 threads. Pistol length gas system. DOES NOT INCLUDE BOLT CARRIER GROUP OR CHARGING HANDLE.