Hey guys so I’ve found that my KWA MP7 is not shooting properly, BB’s are being chambered but not shooting (only sometimes they shoot out) but they are rolling out of the barrel when I point the barrel at the ground From what I’ve read it’s due to the bucking being swollen from silicone oil I’m wondering what bucking is best for not only fixing the problem but also I’d like to know which bucking is best for avoiding the problem once again??? I’ve seen buckings from Maple leaf, RATECH, etc. What brand do you guys have experience with and which do you think would be best?? And is there anything else I could do to help fix the problem for the future as well? Thanks