High Standard Interarms HSA-15   5.56mm

Receiver Forged 7075 T6 Aluminum Mil-Spec
Bolt Carier M-16 Mil-Spec
Finish Type-3 Hard Coat Mil Spec Anodizing
Handguard 15" Commercial M-Lok Light Weight
Flash Hider A2
Gas Tube Carbine Length Passivated
Barrel 4150 CMV 16" Air Gauged Stress Relieved Parkerized 1 in 7" Twist
Trigger Mil Spec Single Stage 4-5 LBS
Magazine 30 round