Arnold, this rifle has a Forged 7075-T6 Aluminum Upper/Lower Receiver with a Type 3 Hard Coat Anodized Finish.

Forged 7075-T6 Aluminum Lower Receiver

Forged 7075-T6 Aluminum Lower Receiver Specifications and Features:
Stag Arms LLC STAG-15 Minimalist STAG580014
AR-15 Semi Automatic Rifle
Direct Gas Impingement System
Carbine Length Gas System
5.56 NATO accepts .223 Remington
16" 4150 Steel Chrome Lined Government Profile Barrel
Button Rifled with a 1:6" Twist Rate
30 Round Magazine
Forged 7075-T6 Aluminum Upper/Lower Receiver
Type 3 Hard Coat Anodized Finish
M16 Bolt Carrier Group
Mil-spec Single Stage Trigger with MFT E-VolV Enhanced Trigger Guard
A2 Front Sight Gas Block with MFT Polymer Flip-Up Rear Sight
Standard Carbine Buffer and Spring with Mil-Spec Buffer Tube
MFT Tekko Polymer AR15 Carbine M-LOK Rail
MFT Battlelink Minimalist Stock
MFT Poly Magazine
MFT Engage Pistol Grip
A2 Flash Hider
Overall Length 32.25" Collapsed / 35.5" Extended
Overall Weight 6.05 lbs
Matte Black Finish