5.56 same as linked below but it also has:
Pinned (by Triarc) Superlative Arms adjustable gas block
Mid length gas tube
Brand new in packaging.
325 shipped with SA block and gas tube!
Pinned (by Triarc) Superlative Arms adjustable gas block
Mid length gas tube
Brand new in packaging.
325 shipped with SA block and gas tube!
14.5" 5.56mm TRACK 2.0 Barrel Mid Length Gas for AR15 Platform
TRACK™ is a proprietary rifling known as Single Edge Polygonal available ONLY through TRIARC Systems. The primary function of this innovation: provide an improved rifling for a barrel.
www.triarcsystems.com
