D-Boys is the only company selling the HK 416 with the M4 LE stock, and an all black front set. I would suggest that you wait it out till your AV goes through, it will be another week or 2 but its well worth it.
If it is a D-Boys the gun should be front wired since it came with a PEQ box battery set up. Also they sell for $175USD.
WE M4-- C8 CQBR
WE M4 13" Troy TRX build
WE M-16 DMR