I have the AR magazine 5.56 model. Would like choices to replace stock add qd attachments. Thanks for help finding another stock.
Going to put a 6x scope on it.

I thought you were asking for instructions to shorten the barrel. I have a 308 and was interested, because I think it's too thin to thread for a suppressor.
There are a few options in stocks but they are all very pricey.

@high_order1

Pretty sure Morgan would be able to cut, crown, and thread the RAR.

He does absolutely gorgeous work, very highly recommended.

https://www.ar15.com/forums/Equipment-Exchange/Barrel-Threading-sale-50-PTR-91-Aug-Scar-Sig-MPX-Beretta-21A-FAL-PAPM92-Pin-and-Welds/143-1029861/?page=68&sc=0#i5823727

For some reason Ruger made a nice handy rifle for 7 ft. Gangly armed shooters. You would think with everything in proportion the length of pull would be about 13 inches. Especially when you have to work the bolt. Original factory stock rides on my shoulder and moves the entire rifle while working the action. My other bolt action doesn't do that but it's on a chassis and doesn't move much.
Trying to figure out how to shorten the material and keep the rubber butt pad. Thanks.

When Ruger introduces another caliber RARR, they typically also offer a compact version (shorter stock) for a few months and then discontinue it.  They have also offered, at least in the past, the shorter stock by itself in black.  The length of pull will be something like 12.5" instead of 13.x".  I've been able to obtain the short stocked 350, 5.56, and Blackout RARR's, but they are hard to obtain unless ordered right as introduced.    

Just checked the shop ruger website; compact stock not listed.  In that case, I'd call Ruger and ask when it will be back in stock...you never know, you might run into a very supportive employee who happens to know of one to send you.  Another thought is go to the Tell The CEO Ruger website and tell the CEO politely what you want and why.  In the case of a part for my SR556 Takedown (that Ruger policy was not to ship a customer, but I saw no reason not to ship it), the CEO then called their NC factory and told a manager to make it happen, and I got a call from the manager...it did take about 5 months, as they were going to put the machine that was used to make it into storage, but I got my extra part.

The butt pad may be attached with glue and not screws.  If it's attached with screws making it short isn't a problem if you have a table saw.  I did it with an after market laminated Mini stock.   If it is attached with glue you will have to replace the but pad with an after market pad.  You can grind one to shape with a bench grinder.  Mark it out first with a silver magic marker and then slowly shape it.  Brownells sells after market but pads that are grind to fit.

kwg

A handful of chassis out there that have adjustable stocks or accept AR adjustable stocks.

I had him do my .308. Cost about $80 in total and I had it back in like a week. I removed it from the receiver myself to reduce the cost. He had to thread it 1/2-28, but apparently this was common on older rifles with thinner barrels. It does deflect a bit because it's so thin, but my suppressor is a pig. All steel and 11" long. If you have a lighter, shorter suppressor or you will always shoot it suppressed, it would be beneficial. I do wish I had a bull barrel.

These have heavier barrels, but you'd have to buy another rifle.
This is from the 20" .308-

https://ruger.com/products/americanRifleHunter/models.html?n=bolt

does anyone know if the Magpul stock will fit on a Ruger American Ranch?

I bought the youth sized version for this reason.  It has 1 inch shorter LOP, IIRC.  Maybe you can find someone who's kid got bigger and wants to swap.

Magpul has a new stock coming out this year. Looks great. What scope do you recommend for the 223 model?

I have a Vortex Viper PST gen 2 1-6 on mine, and I really like it overall. My one beef with the scope is at the lowest illumination setting, the reticle still is too bright for night shooting.