AR-15 5.56/.223 20" stainless steel spiral fluted tactical upper assembly

AR-15 5.56/.223 20" stainless steel spiral fluted tactical upper assembly. Barrel - 20" 416 stainless steel hbar barrel with x-treme fluting. Hardened to 26-32 rc and stress releived.  Chambered in 5.56 NATO, accepts both rounds, 5.56 and .223. 1-8* rh twist 6 groove button rifled. .750 diameter under gas block. Threaded 1/2x28 with xtreme stainless steel muzzle brake and a crush washer. M4 feedramps.

A3  flat top upper reciever - made from certified 7075-t6 aluminum forgings. Black hardcoat anodized to gov. specs. Forward assist and dust cover installed. M4 feedramps.

Gas system - .750 low profile gas block made from aircraft quality aluminum and black hardcoat anodized. Rifle length gas system.

Handguards -  15" rifle-length free floating keymod rail.  Made from aircraft quality aluminum and black hardcoat anodized. Rail may vary in design based on stock availability, the same excellent quality.

Does not come with BCG and charging handle. Can be purchased separately.

*Please note, twist may vary between 1-8 and 1-9, depending on stock availability. Please inquire within.