This barrel comes with a pinned, low profile gas block. Gas block is Nitrided and made from 4140 steel.

Length: 16"
Chamber: 5.56 NATO
Material: 4150 Chrome Moly Vanadium (CMV)
Barrel Profile: Government
Barrel Finish: QPQ Nitride
Gas System: Mid Length
Gas Block: .750"
Twist Rate: 1/7
Muzzle: 1/2 x 28 Threaded
High Pressure Tested (HPT)
Magnetic Particle Inspected (MPI)
Sub-MOA Accuracy Guarantee with Match-Grade Ammunition and proper shooting techniques.
MADE IN USA. LIFETIME WARRANTY.