I built a heavy barrel carbine for my son in 1999. I zeroed it and and put it away as a safe queen. I've upgraded all our carbines to mid-lengths –– this is the last to go.
Don't remember manufacturer (Armalite or Rock River). Rifle barrel extension –– note minimal carrier face/extension wear.
Will ship with 7.0 gas tube, gas tube pin, A2 flash suppressor, and carbine end cap.
$185 Paypal, shipped.
DD 7.0 Omega rail for sale on used rails board, $200 PayPal shipped.
$375 if bought together.