Megan, this is a sad attempt at an post. Did you google .50 bmg and this is exactly what came back again? I Truthfully come to feel like unsubbing from pewpewtactical because of this trash write-up.You got it right. It is a screw-on choke tube. It's not less than comparable to the Lyman/Cutts choke tubes that remain offered on eBay and thru other s