AR-10® A4 Rifle Barrel Assembly


Armalite’s barrels are custom-made for extreme accuracy and long life. This complete barrel assembly includes a MIL-STD 1913 rail gas block, barrel nut, slip ring, slip ring spring, slip ring retaining ring, gas tube and handguard cap.

.750 at the journal (under the gas block)

Out of stock

SKU: B10A4 Category:
7.62X51 mm / .308
20" chrome lined / chrome moly, 4140 steel, M-4 feed ramps
Rifling Twist
1:11.25" RH
Muzzle Device
Flash suppressor, threading 5/8" x 24
Front Sight Base
Gas block with MIL-STD 193 rail
Manganese phosphated steel