Funnily no... if you look at the photos of them, the parker hale bipod, (that one) is the ACTUAL bipod used on the rifle... so its correct...
as for the mag and muzzle... take a closer look... the base gun was a warrior 1 l96, but the entire reciver is custom made by me, barrel work, muzzle break, mag, stock (Which still ajusts vertically mind) and folding monopod. The entire gun is custom, not just a few changed bits
ejection port enlarged a tad? .308 to .50bmg is a bit more than a tad