Rifle Scopes Help, need USO SN-4 1.5-6x Crash Course!

[Walking Stick]

The service from US Optics was amazing but the info sheets are rather lacking as a manual. I'm familiar with using scopes that have already been mounted on rifles and have never zeroed or adjusted one personally.

I just got my SN-4 1.5-6x28mm with JNG Mil, 0.1mil US#1 Windage, 0.1mil EREK elevation (with additional M855 ball BDC turret to go with my 14.5in M4).

1. I can read the markings on the windage turret (...,0.5R,0,0.5L,...) but what about the markings beneath it? What does this 0,1,2,3,4,5... scale mean to me?

2. Before I zero, should I turn it left and right to the limits and settle it in the middle? Then do I remove the allen-head screw to rotate the turret so it's correctly oriented on "0"?

3. I understand the readings on the side of the EREK, but what about on top (0-87 in increments of 3 with CW down arrow and CCW up arrow)?

4. Is the knurled, rotating ring at the end of the occular lense just for focusing? (Not the magnification ring.)

5. It has the new push-button illumination knob, not the older 11-position rotating rheostat. There's the power button and then an up and down button. It turns on fine, but I can't adjust it. Is there a trick to adjusting the illumination that I'm not getting? (Like double clicking, holding for 3 seconds or something.)


I appreciate anyone that can be me on track fast with this new scope of mine so I can put it to good use. There is never too much information or details to give me to help out.

Thank you!

 

[kombar]

Re: Help, need USO SN-4 1.5-6x Crash Course!

1. The markings on the turret are there to tell you what revolution you're on. If your zero falls on line 2, you can tell if you're adjusted right or left based on what numbers are visible.

2. No, the scope arrives centered already. You'd be wasting your time resetting it to 0 since you'd have to do it again after shooting anyway.

3. The top markings on the EREK refer to the clicks of the knob. In the last stage of zeroing the EREK you can use the markings to make your final adjustments by aligning the allen wrench with them, rather than guessing how far you need to turn the center screw.

4. Yes. Use it to focus the reticle. This only needs to be done once.

5. Nothing will happen if you hold the adjustment button. It's possible you have the first style illumination module with something like 32 adjustment levels, and you have to press the + or - button that many times to go from one extreme to the other.