AR-15 Upper A3 16" Barrel 1:9 Twist 5.56 Nato Chamber DS-4 Double Star 121
Chrome moly 1:9 twist DS-4 barrel 16" is mounted on aircraft-quality aluminum flattop upper. Barrels are plated evenly with tough parkerized finish. Fully assembled (minus bolt/carrier and charging handle) with forward assist, ejection port cover assembly, gas tube assembly and heat shielded handguards. M-4 handguard, 16" 1:9 chromemoly match barrel w/ M-4 cut.
The DoubleStar DS-4 Carbine Upper was modeled as a civilian version of the military M-4. This model comes with the M203 Mounting groove in front of the forged “F” marked front sight base and double heat shielded DS4 handguards standard. It also comes standard with a 16” chromemoly 1:9 twist barrel.
•A-3 Flattop Upper
•Barrel Length: 16
•Barrel Twist: 1:9
•Chamber: 5.56 Nato