Generally new bolts don't have a very big impact on a blowback, performance-wise. A good barrel, a good regulator, and compressed air instead of CO2 are all good ideas. A fast hopper is also always a sound investment.
I don't think there is a way to mount eyes on a Mongoose.This might be one of those circumstances where a bolt might actually help, though; if it uses Spyder style bolts, there are some anti-chop bolts that feature a spring to keep the bolt face from moving all the way forward if a ball gets pinched. JAM enterprises invented the concept, but there are a few manufacturers out there that produce these bolts.