Help assembling a silver pigeon

[Shawn the shotgun]

How to i assemble a shotgun their is this metal thing sticking out that makes it impossible to connect to the rest of the gun

[Coffinmaker]

You will do better asking the question farther down the Forum.  I would strongly suggest asking in "Gunsmithing" and perhaps again in "Shotguns."  However, without actually being able to see what you are having a problem with, there is actually no way to help.

[Abilene]

I'll take a guess.  If this is a hammerless shotgun, and it was dry fired without the barrels attached, then the cocking ears that stick out the front of the receiver won't let you reassemble the barrels to gun.  You need to push those two cockng ears down to cock the internal hammers.  Without the leverage from the barrels, they will be hard to cock.  Might need to push them down against the edge of a table (be careful not to mar table or whatever).