Help with a "budget" match rifle build

[A5BLASTER]

I've been really keying in on the Gibbz upper - side charging. But it's pricey as hell for my tastes. Maybe later.

Get the joebobs Spartan upper. It's a direct copy of the gibbz only much cheaper. It's such a close copy of it, even the spare parts gibbz sales fits the joebobs Spartan upper.