Brn-4 Upper Receiver Build Kits - Brn-4 Upper Receiver Build Kit, 16'''' Heavy Barrel

Brownells Brn-4 Upper Receiver Build Kits - Brn-4 Upper Receiver Build Kit, 16'''' Heavy Barrel - view 1

Brownells

Overview

The Brn-4 Upper Receiver Build Kit from Brownells is a stripped upper receiver designed specifically for the AR-15 platform, featuring a 16-inch heavy barrel optimized for 5.56 NATO caliber. This assembly allows builders to customize their upper with their choice of components, such as handguards and sights, while the A4 receiver type provides a versatile foundation for various setups. This upper is commonly found in builds focused on precision shooting and tactical applications, making it a solid choice for those looking to enhance performance.

Specifications

Receiver TypeA4
AssemblyStripped
Barrel Length16
Caliber5.56 NATO
PlatformAR-15

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Frequently Built With

Based on build data

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

100%
AR-15100%

Caliber

100%
5.56 NATO100%

Gas System

50.2%
Mid-Length50.2%
Carbine24.5%
Rifle12.6%
Pistol11.2%
Blowback1.2%
Other0.3%
Frequently Built With Products
ProductCategoryTimes Built Together
BLEM PSA AR15 Complete Classic Stealth Lower, BlackLower Receiver360
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod CCharging Handle259
Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine StockLower Receiver230
Magpul AFG-2 Angled Fore Grip - BlackForegrip166
Radian Raptor Charging Handle & Talon Safety Selector Combo - Od GreenCharging Handle160
Aero Precision Stripped M4e1 Ar-15 Lower Receiver - Special Edition - FreedomLower Receiver142
Build Platform Breakdown
PlatformPercentage
AR-15100%
Build Caliber Breakdown
CaliberPercentage
5.56 NATO100%
Build Gas System Breakdown
Gas SystemPercentage
Mid-Length50.2%
Carbine24.5%
Rifle12.6%
Pistol11.2%
Blowback1.2%
Intermediate0.2%
Proprietary0.1%

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