16" Upper Assy 300 BLK HBAR Std KeyMod Rail No BCG Or CH

Best price

$332.13at Brownells

checked Sep 30, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$332.13checked 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 16" Upper Assy 300 BLK HBAR Std KeyMod Rail No BCG Or CH is a 16" 300 Blackout upper receiver from Radical Firearms. One store lists it, Brownells at $332.13.

Fits and works with

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

Specifications

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

From the manufacturer

Radical Firearms 300 Blackout 16" HBAR Radical Upper Receiver is a flat top, 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 assembled with Upper Receiver, Forward Assist, Ejection Port Door, and Barrel Nut. 16" HBAR Profile Barrel and A2 Flash Hider.