Just recently purchased a model 99 in 358 caliper. The barrel is stamped model 99 F , im trying to verify if this is a featherweight model or not. It is not a takedown version, and i believe the barrel is 22" . i've been told from one source its a featherweight by the f behind the 99 and another source tells me its not a featherweight model. Can someone help me get a straight answer here. I'm not familiar with these guns, and dont know who to believe.