So my friend recently bought a used BE Marauder for 15 dollars to get into the sport, and has had troubles with the marker burping. He brought it to me just recently asking me to repair it, and I thought I'd take a look, although by no means am I a paintball expert, I do have a knack for mechanical systems, and can easily figure out how these markers work. Well, anyways, I opened it up, cleaned the entire weapon, inspected and replaced all o-rings, and lubed/reassembled, and I am still getting the problem. Thinking to check the sear, as is with most burping problems, I opened it once again and inspected it, finding wear on the edge of the sear, so much so that the edge is slightly rounded. I was wondering if, 1: It could possibly be any other component of the marker failing, and 2: If, even though this brand was discontinued, that I could find a similar/replacement part for the sear/entire trigger assembly. Thanks for your time and any help!