Windham Weaponry Varmint Exterminator .223 Rem/5.56 20" Barrel Complete Upper Receiver Assembly - UR20FSSFTVB
- Series/Collection: Varmint Exterminator
- Handguard: Black Free-Floating
- Caliber: 223 Remington/5.56x45mm NATO
- Barrel Type: Fluted
- Barrel Length: 20"
- Barrel Material: 416R Stainless Steel
- Twist Rate: 1:8"
- Receiver Type: A3
- Receiver Finish: Black
This superbly accurate VEX-SS Assembly includes a matched Carpenter 158 steel bolt and carrier mated with a compass lake specification chamber for highest possible accuracy. Barrel is 416R stainless steel matte finished to avoid reflective glare, fluted for lower weight and button rifled 1:8 inches R.H.T. for optimum accuracy with a wide range of heavier 223/5.56 varmint bullets (threaded muzzle barrels avail. on special order.) The tubular free-float VEX handguard now has more M-Lok compatible cooling slots than previous versions. A MIL-STD 1013 Rail Gas Block can mount a front sight, or 1/2 inches high mini-risers will attach a scope or optic.