Brn16a1(R) 20'''' Complete Upper Receivers - Brn M16a1 Upper Receiver 20'''' Rifle Length, 1-7 Twist, Black
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Brownells
Overview
The Brownells BRN16A1(R) complete upper receiver is designed for AR-15 builds, featuring a 20-inch barrel with a 1:7 twist rate that stabilizes a wide range of bullet weights, making it suitable for various shooting applications. Finished in black, this upper assembly provides a classic aesthetic while ensuring compatibility with standard AR-15 lower receivers. This upper is often found in retro builds aiming to replicate the M16A1 configuration, appealing to enthusiasts of vintage military firearms.
Specifications
Brn16a1(R) 20'''' Complete Upper Receivers - Brn M16a1 Upper Receiver 20'''' Rifle Length, 1-7 Twist, Black
Frequently Built With
Based on build data
BLEM PSA AR15 Complete Classic Stealth Lower, Black
Lower Receiver
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock
Lower Receiver
Magpul AFG-2 Angled Fore Grip - Black
Foregrip
Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green
Charging Handle
Aero Precision Stripped M4e1 Ar-15 Lower Receiver - Special Edition - Freedom
Lower ReceiverBuild Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
| Product | Category | Times Built Together |
|---|---|---|
| BLEM PSA AR15 Complete Classic Stealth Lower, Black | Lower Receiver | 360 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 259 |
| Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock | Lower Receiver | 230 |
| Magpul AFG-2 Angled Fore Grip - Black | Foregrip | 166 |
| Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green | Charging Handle | 160 |
| Aero Precision Stripped M4e1 Ar-15 Lower Receiver - Special Edition - Freedom | Lower Receiver | 142 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 71.4% |
| .223 Wylde | 9.7% |
| 300 Blackout | 6.8% |
| .308 Win | 3.5% |
| 9mm | 2.2% |
| .450 Bushmaster | 1.1% |
| 6mm ARC | 1.1% |
| 6.5 Grendel | 0.8% |
| 7.62x39mm | 0.8% |
| .458 SOCOM | 0.6% |
| .350 Legend | 0.3% |
| 6.5 Creedmoor | 0.3% |
| .50 Beowulf | 0.2% |
| .223 Remington | 0.2% |
| .45 ACP | 0.2% |
| .204 Ruger | 0.1% |
| .22 LR | 0.1% |
| 7.62x51 NATO | 0.1% |
| 5.7x28mm | 0.1% |
| .224 Valkyrie | 0.1% |
| 6.8 SPC II | 0.1% |
| .17 HMR | 0% |
| 8.6 Blackout | 0% |
| .22 ARC | 0% |
| Gas System | Percentage |
|---|---|
| Rifle | 100% |
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