Install the Vertical Piece with the bolt and washer provided. Do not use a different bolt or washer to hold the Vertical Piece in place, it is cut for length so as not to bottom out on the barrel. The same is true for the plastic Serration Cover.
The plastic block is for covering the serration’s of the Base when you remove the Vertical Piece for scope use. This will keep the serration’s from being damaged in handling or carrying your rifle in a gun case.

Always keep a light film of oil on the serrations and all threads, this prevents galling.

Now as to sighting in and setting the sight. Insert the adjustable aperture and level the cross hair, lock in place with the lock washer. Put the sight on and go to the range. Adjust your REAR sight to a normal 200 yard setting and record. Set the front sight within two serrations of the bottom of the slot for the 3 minute version, one serration for the 6 minute version. While shooting at 200 yards adjust the rear sight up or down to obtain a 200 yard zero. Now you should have a good 200 yard zero with plenty of adjustment left for the longer ranges. The further the Vertical Piece bolt is from the bottom of the slot for your 200 yard zero, the less adjustment you will have for 1000 yards and beyond.

I use the ZERO as my 200 yard starting point. Now apply your come-ups for the other ranges on the front sight only. The stamped numbers are minutes of change, 3 minutes and/or 6 minutes per serration. As in Alice and Wonderland, Down is Up: You move your front sight Down and your bullet impact will go Up.

My settings are as follows;

200 yards 0 –
600 yards 9.0 minutes up
800 yards 21.0 minutes up
900 yards 27.0 minutes up
1000 yards 33.0 minutes up

These settings are for a 30 inch barrel, anything else will make a difference.

I hope this all makes sense to you. If it doesn’t let me know and I will help you get it worked out.

Good shooting,