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Windham Weaponry 20in Varmint Exterminator Threaded Muzzle Upper Receiver Assembly for AR15 / M16

This Assembly – a variant of our VEX Varmint Exterminator Rifle – offers hunters the option of attaching a sound suppressor for non intrusive hunting. This superbly accurate Upper is precision machined from 416R Stainless Steel, and includes a matched Bolt and Carrier (machined from Carpenter 158 Steel – magnetic particle and high pressure tested). The Bolt is machined to mate with the Compass Lake specification Chamber for highest possible accuracy. The barrel is matte finished to avoid reflective glare, and is fluted to reduce weight, increase barrel surface and add rigidity. A Picatinny Rail Gas Block is included should you want to attach a front sight, as are 1/2” high “mini-risers” for the easy attachment of a scope or optic. An A2 Flash Hider is fitted to the barrel’s threaded muzzle (threaded 1/2” x 28 T.P.I.). The Flash Hider can be easily removed for suppressor installation. Button rifling is 1 turn in 8 inches – right hand twist for optimum accuracy with a wide range of heavier .223 Rem. / 5.56mm NATO varmint bullets.

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