bit of a quick newbie question but I was wondering if the nuprol bocca series 3 will fit onto my specna sa-e07 with all the included fittings, or if ill have to buy something else, thanks!
Delta Rings are on older style M4s, and the 'real steel' Series 3 rail (the Daniel Defense Omega) was intended as a retrofit for older guns with those old style fore ends.
It definitely is NOT any kind of upgrade for your gun, at very best it would be described a side-grade (I see it as a downgrade personally), and will add a good chunk of weight onto your gun in the wrong places.
If you don't like your particular rail, I would suggest taking a look at AliExpress. Much cheaper, and largely the same gear that Nuprol sells (Nuprol only re-brands cheapo chinese kit and adds a huge mark-up).