LENGTH: 16" 1/7 Twist
CHAMBER: 5.56 NATO (Will Also Shoot .223 REM)
GAS BLOCK: Low Profile .750, Mid Length Gas System
MATERIAL: 4150 CMV
FINISH: QPQ Nitrided Inside and Out
MUZZLE DEVICE: A2 Birdcage
Barrel Extension W/ M4 Feed Ramps
MODEL: 7075-T6 Aluminum Forged A3 Flattop W/ M4 Feed Ramps
Includes Forward Assist and Dust Cover
CHARGING HANDLE: 7075-T6 Aluminum, Standard GI
BOLT CARRIER GROUP - 8620 Full Auto Profile Carrier, 9310 Shot Peened and MP Bolt,
QPQ Nitrided, Properly Staked Gas Key.
Sulzer SMR 15 M-LOK Free Float Rail
W/ BCG Charging Handle 4lb 5oz
W/O BCG Charging Handle 3lb 8oz
100% USA MADE
*Complete upper receivers may take up to 7 business days to ship.
SULZER FIREARMS provides a 100% satisfaction guarantee against defects in original materials and workmanship. If you discover such a defect SULZER FIREARMS will make every effort to replace or repair your product as quickly as possible. This guarantee does not cover normal wear and tear or damage caused to our products from use with products of other manufacturers. Be sure to save your receipt as proof of purchase when making a claim.