Can a pistol buffer tube be used for a rifle type stock? What happens if the springs get mixed up as a rifle ty pe spring in a carbine tube? Or a pistol spring in a carbine tube? I know I am a little slow on things and I simply need to know why such and such must be this way. This ar bug has really got my mind dreaming up all sorts of things. I was thinking you could make a pump action out of one so I did it. I have it all together and it works good. I am finishing the parts then we will put it all together and see if its better than my amish machine gun(760 remmy in 35 rem). I have plenty of ideas but meds and fixed income keeps me close to the house!