I have two AR-10A2's I've converted into the A4 configuration, one has an Eagle Arms 24" chromeoly barrel with the aluminum free float tube and Match Rifle sights, the other is the old 20" chrome lined GI barrel (medium weight with the original muzzle brake removed and A2 alash hider installed) with the Armalite AR-10T fiberglass free float tube, I just completed the Armalite 2-stage trigger installation on both.
I fired the 20" rifle with a 4x14x56 Springfield Armory scope and it held 3/4" to 1/2" groups at 100 yards, I have yet to fire the 24" rifle since changing triggers.
I just bought this AR-10T Navy (16" barrel) ans it is shooting 1/2" groups with a 6x Springfield Armory scope with Federal Gold Medal Match ammo.
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