Receiver/barrel extension problems


Hello. First post. My name is Wayne. Just put together a upper and ran into a new problem. My barrel extension sticks into the receiver too far. I have seen the issue with not matching the feed ramps, but this is something totally different. Attaching pictures.


Is the extension too long?


I’m honestly not sure what size it should be. Point me in a direction?


Hey @Wayne_Adam , that is an interesting looking upper receiver.

Please provide the brand and model / variant of the upper receiver and the barrel. The more detail the better. More pictures of each wouldn’t hurt either.

In terms of measurements, if it is a small platform (AR-15) you’re looking at roughly .98" from the inside shoulder of the barrel extension to the end and about 1" measurement from the receiver face to the feed ramps. See below: