PSA PA-15 Classic AR-15 Rifle 5.56 16" Nitride M4 Carbine, Black

Caliber:  5.56 NATO
Barrel Length:  16 inches
Barrel Profile:  M4
Barrel Steel:  Chrome Moly Vanadium
Barrel Finish:  Nitride
Chrome Lining:  No
Muzzle Thread Pattern:  1/2" x 28
Twist Rate:  1 in 7"
Barrel Extension:  M4
Gas System Length:  Carbine
Diameter at Gas Block:  .750"
Gas Block Type:  F-marked Front Sight Base
Muzzle Device:  A2 -style
Receiver Material:  Forged 7075-T6
Receiver Type:  M4
Handguard Type:  M4 with heat shields
Bolt Material:  Carpenter 158 Steel
Bolt Carrier Profile:  Full Auto
Fire Control Group:  Standard Mil-Spec Trigger Group
Grip:  A2-style
Stock:  M4-style
Buffer Tube Length:  Carbine
Buffer Tube Diameter:  Mil-spec
Overall Length:  32 inches
Weight (as configured):  6.8 lbs
Magazine: 30rd Magazine (1)