
Z-Parts HK 416 Handguard Rail System Screw
The Z-Parts 416 Handguard Rail System Screw is used to attach the keep the 416 handguard in place and together. It will fit the VFC 416 GBBR. All CNC construction out of steel this is a reliable and durable upgrade for your 416.

So before y'all burn me at the stake - I thought "it's cheap and I'll gamble it's the right size/thread pitch" - and I was relieved to see it was.
I saw these 416 airsoft handguard screws that have the cross pattern which I wanted for the ability to field strip using the bolt head instead of some other tool. Full CNC machining, manganese phosphate surface treatment and made from alloy steel.
Compared to an MR556 screw, they both weight 12grams, they both have identical measurements, and they both feel sturdy.
Am I saying this is as good as German? No. Am I saying it's comparable and in all likelihood will work for significantly less, and more readily available? More than likely. I'm willing to run it 🤷🏻♂️
Here's pics of measurement and fit/finish compared to an MR556 handguard screw
The lengths are marginally different, but it has no affect on fitment.
Even fits a 416 bolt head like I wanted (ignore how I have no cam pin or anything and the bolt head is rotated wrong, threw it in for demonstration)