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The upper receiver and rails are precisely milled from a monolithic block of aircraft grade 7075 T6 aluminum. Any sighting systems mounted on the M1913 Picatiny rails will stayed zeroed through the toughest of missions.
Designed with reliability as it's primary feature. There is no gas system to become clogged with carbon or fouling making any maintenance a snap. The bolt and chamber stay clean well beyond extended shooting sessions.
The AR57 PDW Upper receiver comes with a ER Shaw barrel, precision manufactured for exceptional accuracy and extreme durability - offered in numerous lengths and features.
