I fail to see enough of a difference between the two that would justify a new production line.
550 has:
better plastic?
Rubber dust cover
Better barrel?
Not available in 7.62
tailored for swiss ammo specifically?
Maybe someone who is more educated can chime in on the actual differences.....
550 has:
better plastic?
Rubber dust cover
Better barrel?
Not available in 7.62
tailored for swiss ammo specifically?
Maybe someone who is more educated can chime in on the actual differences.....