User Ratings
No ratings yet
Be the first to review this product
The Adams Arms P3 300 Blackout 12.5 Inch AR Upper Receiver features a PROOF Research Carbon Fiber Wrapped Barrel with a Jet Compensator muzzle device, ambidextrous charging handle, low mass carrier, an ergonomic free float rail, and our signature P-Series Micro Block Adjustable piston system. This upper is manufactured and ready to compete with any other long range, precision AR on the market.
What’s in the Box
- Adams Arms P3 300 Blackout 12.5 Inch AR Upper Receiver
Firearm Features
- Jet Compensator Muzzle Device
- Complete Upper
- AARS M-LOK Handguards
- 5/8 x 24 Thread
Firearm Specifications
- Manufacturer: Adams Arms
- Model: P3
- Caliber: 300 Blackout
- Barrel Length: 12.5"
- Twist Rate: 1:7
- Finish: Black Nitride
- Sights: Optic Ready
Specifications
- Manufacturer:
- Adams Arms
- Category:
- upper-receiver
- Caliber:
- .300 AAC Blackout
- Platforms:
- AR-15
- Length:
- 12.5"
- MPN:
- FGAA01366
- Required Component:
- Yes
Parts Cabinet
Track parts you own or plan to buy.
Where to Buy
Have one to sell?
Sponsored
MantisX
The smart way to train your AR build
Built your rifle — now train it. BlackBeardX installs in minutes and turns your AR into a full dry fire system with smart feedback on every pull.
Shop BlackBeardXPrice History
Current
$1,682.99
Lowest
$1,682.99
Highest
$1,682.99
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertSimilar Products
Bravo Company BCM4 Upper Receiver Assembly Flat Top With Forward Assist 1913 Rail
Bravo Company Manufacturing (BCM)
$129.00
Aero Precision AR15 Assembled Upper Receiver - Anodized Black - APAR501603AC
Aero Precision
$118.99
LMT Monolithic Upper Receiver - AR-15 - MRP-L - M-LOK - Specwar - 11.5"
LMT
$912.60
Griffin Armament Mk1 Upper Receiver Assembled Aluminum Black
Griffin Armament
$113.95
BCM MK2 Carbine Barreled Upper MCMR-10 - 12.5in
Bravo Company Manufacturing (BCM)
$820.39
AERO PRECISION - 5.56X45 NATO ASSEMBLED UPPER RECEIVER NO AUTO SEAR CUT FOR AR-15
Aero Precision
$119.99
COLT Monolithic AR-15 Pistol Complete Upper Receiver 5.56x45 NATO 11.5" Barrel
Colt
$959.99
Luth-ar UR-01-M16-A A1 Upper Receiver 223/5.56mm Aluminum Black Hardcoat Anodize
Luth-AR
$180.69
Builds Using This Part
No builds yet — be the first to use this part.
Related Guides
Guide
5.56 NATO, .223 Remington, and .223 Wylde: Chamber Differences Explained
A technical breakdown of the differences between 5.56 NATO, .223 Remington, and .223 Wylde chambers — what each accepts safely, and how to choose for your build.
5 min read
Guide
AR-10 Receiver Patterns: DPMS vs. Armalite Compatibility
The AR-10 has two incompatible receiver patterns — DPMS and Armalite — that look similar but do not share parts. This guide explains the differences and how to buy correctly.
6 min read
Guide
The AR-10 Platform: What It Is and How It Differs from the AR-15
A practical overview of the AR-10 — its origins, how it differs from the AR-15, available calibers, and when it makes more sense than a standard AR-15 build.
6 min read