New to me JR Carbine's bolt gets stuck after firing couple of rounds. It gets stuck in the middle of it's travel and it takes huge amount of force to even move it.
After I dissemble the uper, take the bolt out, put more lube- it is tight but slides back and forth fine. After reassembly- same thing. Couple of rounds and stop.
Previous owner, who I trust, said he never had any issues with it.
Any ideas?