mekkisman

I have just built a PA-10 using their lower and 18" mid length kit. I would like to install an M16A1 butt stock. The M16A1 buffer tube is about 2" deeper inside than the supplied carbine buffer tube. Is there any reason I can't just install a 2" spacer to fit between the back of the tube and the spring? I'm a retired machinist with access to a lathe and aluminum and Delrin stock.