Are they both chrome lined? Often $50 is about the cost of adding CL.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek
The $50 gives u the opportunity to have them swap hand guards, option for bcg for $100 . Muzzle breaks option, charging handle option and rear sight option and palmettos roll mark is laser engraved on the upper. The cheap $299 is you get what u see no laser engraving which is fine with me but it saves u some $$$ if u want different options and be able to make it complete since they are out of stock on BC G's by themselves