The Adams Arms Standard 5.45x39 Piston Upper:  

• Adams Arms 16” Carbine Barrel

• 1:8 Right Handed Twist

• M4 feed Ramps

• Chambered in 5.45x39 Russian

• Melonited Piston Parts, Barrel, Bolt Carrier, and Flash Hider

• Ionbonded 5.45x39 Bolt

• M4 Style Handguard and Handguard Cap

• Comes With 30 5.45x39 Magazine

• Comes With Wolff Extra Power Hammer Spring

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