I have one MAS-49/56 semi auto rifle that is re-chambered {Century conversion} for 308. Buy the original 7.5x54, 10 round detachable magazines, because the feed lips might have been sanded down a tad too much. My two magazines seem to function well without altering the size of the the feed lips. I bought mine from a fellow shooter on our range for $500.
It is still legal to purchase in Maryland...that has a side rail mount for a scope or red dot reflex sight. The original sniper scope is getting rarer to buy on GunBroker. I believe I have a S&K rail mount that is fitted so the dust cover and bolt can be removed without removing the side rail scope mount. The hammer must be cocked for bolt removal.
It has a muzzle brake/flash hider, grenade launcher/grenade launcher sight, gas valve check for shooting grenades, adjustable rear iron peep sight, with an adjustable front pin sight and a slip-on MAS recoil pad. I have a HI-LUX red dot reflex sight on the side rail mount, with a new cheek rest pad on the buttstock. I generally shoot 147 grain Wolf ammo, that uses mil-spec hard primers out of it. I suggest using no higher than 147 grain bullets out it.
"The MAS 49 or the MAS 49/56 has been known to burst fire {two or 3 rounds at a time} because of sensitive primer ammo. The original heavy steel firing pins on the MAS 49/MAS 49/56 can be replaced by commercial titanium firing pins" {I have a $80 titanium firing pin on mine} "which are much lighter an generally cures the problem of burst fire/slamfire on these weapons.
It is also possible to prevent these slam fires by shortening the firing pin by approximately 0.5mm, or by modifying the firing pin to accommodate a firing pin return spring"--- Not the bolt like it says in this following Wiki link.
My MAS 49/56 is fun to shoot...with moderate recoil and frontal ejection vectors.
https://en.wikipedia.org/wiki/MAS-49_rifle