Im new to the M1A world and ordered a springfield 'precision rifle' in the archangel stock. Im interested in a rail system so I can run forward NV. Ive read that the cas v will not fit a NM barrel. Im wondering if anyone has 'made' one fit and if so what was involved. I have a machine shop at my disposal. I emailed vltor and all they said is that it would void the warranty. I also looked into the troy and knight but the vltor seems to be a good product and I've had good luck with their products thus far. Any help is appreciated.