Re: need help designing a rifle like the remington msr
There is no reason to re-design anything really. The main features of the MSR action are that is a 3 lug bolt, can swap barrels easily, and has a bent bolt handle to fit into a specific spot on the stock.
The rest of the features are in the stock, i.e. it folds, takes detachable mags, has adjustable ergonomics, etc.
All of this is readily available without any cutting. For example, just buy an AI AE, AW, or AX. You could buy a TRG as well and throw in in the Ashbury stock, or you could just get one of the Cadex stocks that is just like the MSR and get that 4 lug action with it.
It is good to think about different ways of doing things and trying to be creative. I encourage you to keep working, learning, and evolving. A long time ago I asked a forum about one of my first designs and they were pretty skeptical and rightly so, but I learned and improved my skill and knowledge. I can tell you that gunsmithing school won't give you all the skills you'll need to design a rifle, at least for production. You're going to need to know 3D design software, machining, manufacturing processes, etc. Your best bet would be to become an engineer, industrial designer, machinist, or the like, then learn all you can about internal ballistics from the few sources that exist. As another bit of advice, calling yourself an "up and coming" anything usually isn't the best idea. If you've had some small successes or shown flashes of brilliance, other people may label you an up and comer but when self applied will likely invite the ire of those you meet. You're young and have time to learn from your mistakes, thankfully this is a good forum for learning (usually). Good luck,
Justin