I ordered a Benjamin Marauder .177 and was sighting it in today. After one of the shots, I had a hard time pulling the bolt back. I got the bolt back and removed the magazine, which was also hard to remove but I wiggled it out, inspected it and then slid right back in without any issue. During shot my next shot I got a dull thud of blow back in my hair. I pulled back the bolt and removed the magazine. Ever thing seemed fine but then I noticed a o-ring sitting on the stand. I believe somehow O-Ring 38 or 39 came out of the breech. How do I get it back in? Do I have to remove the barrel or can I get it back in from the breech face?
http://www.crosman.com/pdf/manuals/1763%20&%202263%20EVP%20&%20PL.PDF
http://www.crosman.com/pdf/manuals/1763%20&%202263%20EVP%20&%20PL.PDF