My Magnum research was less than 5 pounds from the factory; 4.5 pounds actually. I like the graphite barrel. Mine shoots in the .3s from 50yds and .66 at 100 yards. It doesn't look like they sell it separately anymore, but they have an aluminum Ultra tensioned barrel.

 

Light is a relative term. You want light? Skeletonize a standard Ruger plastic stock, use a steel lined, plastic barrel from Ramline (no longer available) or a carbon fiber bbl from somewhere.

The below 10/22 in a skeletonized Ramline folder with Ramline plastic bbl weighs 2.7 lbs. Want even lighter? Remove the pistol grip.

With the standard Ruger plastic stock it weighs 3.3 lbs. Cut that stock down to just in front of the V block and skeletonize the buttstock and you could probably cut 6-8 ozs.

 

Im not afraid to say my home brew 'Super-Lite' goes 4.25 # c/w oem 10rd mag:
Late 90's action, JWH bolt & charging handle, oem trigger group with JWH Hammer
Williams(?) alum scope rail
Old Weaver 7/8" tube D-4 scope, c/w rings 6.5oz. so with rail about 8oz. total 4x optics
Only the buttstock of the Ruger take-down set, 24oz. (so I didnt have to futz with channeling a stock to freefloat the diy bull barrel used below).
Modded factory carbine barrel: bobbed to 16.25" o.a.l., lathe turned to 1/2" from the barrel breech swell on out and a .920ish O.D. alum sleeve fit over to about 9.5"/ a black plastic floating barrel shroud to the muzzle on rubber bushings. It looks like a short bull barrel with a 'can' up front but is over legal length, just has the look of a sbr and goes 20oz. (oem c/w sights is 28oz.) Note that the expensive, fancy Volq CF barrel is 15oz, only 5oz. less.
Light, trim, cheap build and effective, shoots as well at 50yds as any decent oem 10/22 carbine barrel Ive tried.

 

Volquartzen carbon fiber Barrel 15 ounces. Blackhawk Axiom Rifle Polymer/Aluminum 1 pound two ounces.

 

This is light enough that you can hold and shoot it like a pistol. I assembled it all from used parts, excepting the stock, sear and hammer. Tac-Sol barrel massaged by Que, bolt by Que, trigger by me with R/T parts and additional tuning by me. Stock by Boyd's, Millet dot sight.

 

3.9 Lbs.

 

Tap how about a little parts info/source... the butt stock/buffer tube and grip please..

Mine is a one off custom and I have others ask for one so I was hoping you have a source...

Mine is 4.2 lbs (W/O mag ) could get it down to the 3's with a carbon fiber Handguard.... $ 250... nope... not happing... yet LOL

 

light guns can be a little harder to shoot accurately..mine could be a bit lighter with a different scope on it

 

Check out the Blackhawk Axiom. It's an extremely lightweight stock with a collapsible butt that will fit even the smallest shooters. It's the smallest, lightest stock out there.
The length of pull is adjustable from 9.75" to 13.5"... The Ruger 'youth' compact has a 12" or 12.5" LOP. The entire stock only weighs 1 lb 2 oz!

These stocks weigh nothing. I used one for one of my kids. You can get them for $65 and free shipping off Ebay. If you need a cheek riser, these are available.
https://www.ebay.com/itm/BlackHawk-...ised-Cheek-Piece-Adapter-For-Rifle-Butt-Stock-/262990103294?hash=item3d3b6e82fe

Combine one of these stocks with a lightweight barrel, and the gun will be so light, it won't even feel 'real'. lol

This same combo (minus the cheek riser) was built for someone's tiny little daughter here to shoot steels.

 

Why even have a handguard on a 22 if trying to shave weight?

 

Grip and Stock

https://www.venomdd.com/products/carbon-fiber-skeletonized-ar-15-pistol-grips

https://www.midwayusa.com/product/5...iber-stock-for-ar-15-dedicated-22-long-rifle-conversions-carbon-fiber-and-black

Hope this helps!