Your under lever looks great. I think it's a 75A-1. Did you tear it down and rebuild it.For the Arrow break barrel the B2 kit Is TF. Go to Pyamyd, click home, then accessories, then click cleaning and maintenance, then cleaning kits & tools. 15th item down. Tech Force spring gun cleaning and parts kit with seal etc. $9.55, part # PY-A-3453. You can probably make all that work.