Alexander upper receiver kit.50 beowulf 12" threaded

FEATURES:
Barrel: 12"
Twist:1:20
Threading: 49/64-20RH
Thread Protector Included
Includes complete upper receiver
Charging Handle
Gas block
Dowel pins
Gas tube
Complete BCG with bolt
One 7 Round Magazine

Other Features: Kit includes threaded barrel, low profile gas block, mid-length gas tube, upper receiver engraved with alex-a 50 beo, charging handle, complete bolt carrier group, kit does not include barrel nut or handguard, in kit form not assembled