• Buffer Tube - Commercial or Mil Spec? Sep 28, 2015 Of all the parts of an AR15, the one part that is not standardized is the buttstock buffer tube. At first you would think the difference is just the diameter..

AR-15 16" sabre defence mid-length barrel 1-9 twist. CHAMBERED IN 5.56 NATO (ALSO ACCEPTS .223 ROUNDS).

• MADE FROM 4150 CMV STEEL HARDENED TO 26-32 RC AND STRESS RELIEVED.
• BLACK PHOSPHATED COATED
• MID-LENGTH LENGTH GAS SYSTEM
•  1-9 RH TWIST BUTTON RIFLED.
• CHAMBERED IN 5.56 NATO (ALSO ACCEPTS .223 ROUNDS).
• .750" DIAMETER UNDER GAS BLOCK.
• 1/2-28 STANDARD THREADED MUZZLE END TO ACCEPT MUZZLE BRAKES/COMPENSATORS.
• COMES WITH BARREL EXTENSION AND EXTENSION PIN INSTALLED. THIS BARREL ALSO HAS THE GAS PORT HOLE PRE-DRILLED. BARREL EXTENSION HAS THE M4 FEEDRAMPS.

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