Designed as a replacement upper for your standard Sugar Weasel or for whatever Frankenstein build you can think of. This upper receiver is paired with a 13", 1/2-28 threaded, tapered 1:7 twist 5.56 barrel and our adjustable gas block with carbine length gas system.
*DOES NOT INCLUDE BOLT CARRIER GROUP
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Astra has the hookup!
Just got my upper and sling today. You rock!