If you mean the Mini-14, it will get the job done within its limitations.
One could purchase a Ruger Mini 14 Rifle gun at a Wall-Mart store, or using the online Wall-Mart site. One could also purchase a Ruger Mini 14 Rifle gun at a local gun shop.
If you go to Ruger's website you can download the manual for your mini 14 for free. It tells how to disassemble your gun in the manual.
I like the stainless steel Ruger mini 14. You did not say what cal. or rifle or pistol.
Good
Most episodes they carried ruger mini 14 and the pistols were 1911's
Upload a photo of it to a gun forum to identify it, guns are not identified by their serial number, they are identified by their model name. For example : Ruger Charger, Ruger Mark, etc.
It´s an American Ruger Mini-14/GB-FGreetz
Go to the Ruger Website. Under customer service, select historical data, the type of gun, the model, and check the table for serial number range data.
I do not believe the RG 14 is a Ruger. These were inexpensive German made handguns (Rheinmetal Gemeinschaft) that sell for $25-$50. IF your firearm is marked RUGER on the barrel or frame, I could be wrong. If it is marked RG, not a Ruger.
This gun is made by Ruger and is available in the ranch rifle of standard version. Also a target version with a barrel stabilizer.
If it's an older gun it's likely 1:14 twist. Most of them were.
You can contact Ruger's customer service to find out.