Description
Product Overview
Our AR-15 Complete Upper delivers precision, reliability, and top-tier performance right out of the box. Built around a 20″ 416R stainless steel fluted barrel chambered in .223 Wylde, this upper is engineered for accuracy — capable of 1 MOA or better with quality match ammunition.
Assembled and test-fired by our armorers here at Mid State Firearms, this complete upper is ready to drop onto any standard AR-15 lower and head straight to the range.
Key Features
20″ 416R Stainless Steel Fluted Barrel – Match-grade precision, enhanced cooling, and reduced weight without sacrificing rigidity.
.223 Wylde Chamber (1:8 Twist) – Safely fires both .223 Remington and 5.56 NATO while maintaining exceptional accuracy.
Rifle-Length Gas System – Smooth cycling and reduced recoil for better control.
15″ Hybrid Slant Front M-LOK Rail – Lightweight, ergonomic, and fully compatible with M-LOK accessories.
Competition Muzzle Brake – Significantly reduces recoil and muzzle rise for fast follow-up shots.
7075-T6 Mil-Spec Aluminum Receiver – Type III hardcoat anodized black with M4 feed ramps for consistent feeding.
Microbest Full Chrome Bolt Carrier Group – One of the most trusted BCGs on the market, built to strict mil-spec standards (details below).
Extended Latch Charging Handle – Makes charging easy, even with large optics installed.
.750″ Low-Profile Steel Gas Block – Secured for reliable long-term performance.
Stainless Steel Rifle Gas Tube – Corrosion-resistant for extended service life.
1/2×28 Threaded Muzzle – Ready for most muzzle devices and suppressors.
Fully Assembled & Test-Fired – Zero guesswork—install and shoot.
Microbest Chrome Bolt Carrier Group – Premium Reliability
A solid Bolt Carrier Group (BCG) is the heart of your AR-15’s reliability, and Microbest produces some of the best in the industry for military contracts and top-tier rifle builders. This BCG is built from the ground up for dependable service:
Carrier: 8620 steel, full-auto M16 profile, full hard chrome exterior for corrosion resistance and smooth operation.
Bolt: Carpenter 158 steel, shot-peened, High Pressure Tested (HPT), Magnetic Particle Inspected (MPI) for structural integrity.
Extractor: Phosphate finish for optimal grip on case rims, Sprinco extractor spring and insert for consistent extraction.
Gas Key: 4130 steel, chrome coated, secured with OCKS (Optimized Carrier Key Screws) and properly staked for maximum durability.
Cam Pin & Firing Pin: 4140 steel with chrome finish for wear resistance.
Built to true mil-spec standards for long service life.
Specifications
Component Details
Barrel Length 20″
Barrel Material 416R Stainless Steel, Fluted
Barrel Twist Rate 1:8
Chamber .223 Wylde
Gas System Rifle-Length
Rail 15″ Hybrid Slant Front M-LOK
Muzzle Device Competition Muzzle Brake
Receiver Material 7075-T6 Aluminum, Type III Hardcoat Anodized
Bolt Carrier Group Microbest Chrome BCG (HPT/MPI, OCKS screws)
Charging Handle Extended Latch
Gas Block .750″ Low-Profile Steel
Gas Tube Stainless Steel
Muzzle Threads 1/2×28
Feed Ramps M4
Accuracy Potential 1 MOA or better with quality ammo
Assembly Factory-Built, Test-Fired
Why Buy from Mid State Firearms?
Expert assembly by experienced armorers.
Top-tier parts from trusted manufacturers.
Every upper is function tested and live-fired before shipping.
Knowledgeable support staff to answer build questions.
Related Products & Upgrades
AR-15 Lower Parts Kits
AR-15 Buffers & Springs
AR-15 Muzzle Devices
M-LOK Uppers
Compatibility
Fits all Mil-Spec AR-15 lower receivers. No FFL required — ships directly to your door.
What’s Included
Complete AR-15 Upper Receiver Assembly
Microbest Chrome Bolt Carrier Group
Extended Latch Charging Handle
Order now and experience the accuracy, reliability, and performance trusted by serious shooters nationwide.
