Did you have the bolt locked back when reinstalling the barrel? Also, make sure the forearm is in properly.

 

You don't have the barrel completely seated. Start over by first cocking the hammer and putting the safety on. Leave the bolt in the rearward position. Then remove the barrel, forend, gas valve spring, etc.

Then, with the piston in place, place the barrel all the way into the receiver. Add the gas valve and spring, the forend, and the forend cap and screw the cap down snugly.

If that doesn't fix the problem, then you probably didn't get the operating rod inserted properly into the bolt assembly, so you will have to remove the barrel and stuff again and make sure you got that part right.

BTW, when you put the connecting rod back into the rear of the bolt, you did make sure the U-shapped channel of the connecting rod was pointing up didn't you?

 

Thank you for the tips. The connecting rod was facing in the proper orientation when I re-inserted the bolt assembly. I'll try re-inserting the barrel and see if I can get it. Thank you again for taking the time to help!

Hobie

 

I'm having the same issue. The first time it happend, the outer forearm casing wasn't seated properly. Now, I can't figure it out.