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1:7 twist Specifications and Features:
Core15 Tac M4 Ultra Light Semi Automatic Rifle
5.56 NATO (accepts .223 Remington)
16" Barrel
30 Rounds
Synthetic Collapsible Stock
Midwest Industries SS Series Quad Rail
Black
Mil-Spec forged 7075-T6 lower and upper receivers w/Type III Class II anodized finishes
Lower: beveled magwell for improved reloading speed, machined chevrons in front strap, bullet pictogram safety markings
Upper: M4 feed ramps, (1913 Picatinny rail flat top) w/dry lube internal finish and laser engraved T-markings
**************4150 CMV Chrome Moly M4 profile, chrome lined 1:7 twist barrel ********
Direct gas impingement gas system
Gas tube made of 304 grade SS
Chrome lined SS bolt carrier and bolt carrier key
Magnetic Particle Inspected (MPI) Carpenter 158 bolt assembly
A2 flash hider
A frame front sight base (forged)
Magpul MBUS rear sight
Midwest Industries SS Series drop in quad rail
A2 pistol grip
Core15 6-position retractable stock
Magpul PMAG
Weight 5.2 lbs

This rifle has a 16” 4150 CMV - Chrome Moly - M4 Profile - Chrome Lined Barrel with a 1:7 twist rate.