Looking for a good buy/or trade on a rifle scope with these characteristics: 40mm 50mm objective lens 14 to 20X power max 3.5 to 6 minimum power Side focus Not too long of scope body Need Right ocular diameter to clear rear sight on an M1A with low to medium rings Also may need ring set I have lots of trade goods including a Austrian FAL upper minus receiver, Austrian FAL Lower, Israeli HB Fal parts kit and other small parts for FALs some incha nd some metric. I may consider trading a firearm for a quality scope. I would like Leupold, Vortex, SWFA or similar. May consider Bushnell, or others. Thanks for looking.