Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: How well will it hold an AK47 for optics adjustment at 100yards. I want to use it for final scope adjustments. Will this work well?
Document: I have been looking for a rest that would work with ARs and 30 round mags and this is it. This rest is extremely well built and heavier than I expected even without any extra weight. It has a wide range or adjustments and the front strap is great.Note: The assembly manual is wrong. Pictures 3, 4 & 5 show the front frame tube installed upside down, with the adjustment knob on the bottom. Picture 10 and the box show it the right way.
This lead sled holds your rifle for cleaning, shooting or any reason to lay your weapon down. Has several adjustments. I use it for cleaning and zeroing rifle scope.
I have only used this a couple of time so far but it has worked well. The leveling feet are good and the up and down aiming adjustment is good. An improvement that could be made would be to add an adjustment to allow the gun to be  rotated left or right not only up and down. Easy to use and holds my guns well.
I tested this out at the range with a 25 lb bag of shot in the tray today, it worked very well with AR's or similar weapons that have a buffer spring to absorb recoil (AK's need to use shorter magazines in it, and AR's may have to have the buttstock closed to a shorter setting to fit the 30 rd mag) but did not work all that well on bolt action rifles.
Solid product and well suited to large magazines. I find it pretty stable without added weight for an AR-15. I agree with others it does not work well for left handed use and sling swivel does not fit well into rear but gun is loose if swivel removed. Rear strap would help maybe. Easy to use.
Anyhoo, after 10 years stored in my 'dank' basement, this thang still looks and performs like it IS BRAND NEW!! Newer cradles have a 'windage' adjustment these days but I've always just manhandled my windage adjustments by moving the 'Solo' around and no complaints.
Fairly steady rest with only a little lateral movement when I get down into my shooting position. The windage adjustment is a little course but worked well enough  for me to fine tune my 250 yd zero.
I priced a few different types of bench rests and Led Sleds and this one works perfect for the price.HINT: I put two 10 lb steel weights (bar bell style) on the single center adjustment bolt in the front and two 10 lb steel weights on each side on the other two legs in the front, 50 lbs holds it good and I use the pan section to drop shells out of the brass catcher while it is unzipped.
I've used the gun rest several times and very pleased so far. The most impressive feature is the spring recoil absorber for the larger caliber rifles. I can shoot as long as I care to without the shoulder soreness I was experiencing. It is easy to adjust and holds the setting well. I also like the tray for either adding weight or whatever. It is very well made, sturdy and looks like it will hold up for a long time. A very good investment.
Easy to sight in scope or red dot optic with two rounds. Totally eliminates human error. For more stability use extra cushioning at the front and rear rubber pads. I find that this sled is heavy enough without added weight when shooting 5.56mm and under. Add weight when shooting .30 cal and above. You can use a 30 round AR magazine with no clearance problems. Only use this for sighting in then set it aside.
Answer: yes