So I figured out that I really wanted a HK416 again after Dale requisitioned his Madbull DD RIS II MK18 in FDE and I ended up selling my King Arms M4 CQB. Turns out that I really missed having a mid-length rail system with a CQB barrel length in a M4 platform – the King Arms M4A1 (SOPMOD Block 1.5) and WE M4A1 (SOPMOD Block 2) just weren’t cutting it on their own.
Airsoft Depot (amoung other Canadian airsoft retailers) recently picked up the new version of the Dboys HK416 without trades – black body, rather than the old gray finish. Out of the box, the rail-mounted HK diopeter sights are mounted, and there’s a LE style stock on the buffer tube. Fits like a glove with Dytac Invader mags (FDE pictured below), loosely designed off of Troy Battlemags they also look really cool.
Coming in a huge cardboard box with a clamshell style of styrofoam inside, I ended up with one cool looking HK416 (see below for what I’ve done to mine thus far).
Let’s get to the disassembly part of things. We’ll start at the rear of the gun. VFC style buffer tube and end plate. GBB/real steel stock adaptors would work with this stock tube, no problem… I’m going to be putting my PTS ASAP for GBB M4 on there. Buffer tube is shorter than normal; instead of being a full 6-position stock tube, the tube only has 5 positions, but at the same intervals as a 6-position tube would have, thus the tube is a whole position shorter than most tubes.
Long extension at the rear of the lower receiver. Note how I put in a new wiring harness/switch assembly for going rear-wired to the stock tube/crane stock. Out of the box, the gun is front wired, with the wire coming out a notch at the rear left of the railed handguard.
Front body pin is really tight fitting – have fun trying to punch that out on the fly on the field (I ended up needing a hammer and punch, which I’ve never needed on any Airsoft gun). Splitting the upper and lower receiver is exactly the same as dealing with a VFC AEG. Upper and lower fit together really nicely, by the way – I’m thoroughly impressed, seems to be similar to VFC in external build solidity thus far. The rail/upper fits together the same was as the VFC, WE and real HK416 fits together – slot in the upper meshes with a protruding notch on the rail system, all while fitting really nice and tight over the barrel nut.
Dboys cloned the bolt stop stuff on the side of the gearbox shell – however my version does not have the bolt ornament plate, nor the bolt lock mech on the side of the gearbox. The mould on the side of the shell, however does exist.
So – fun fact, Dboys did a great job on the motor grip. VFC clone, nice and thin, while having a very pleasant texture that is very grippy. Better than VFC thin-type M4 motor grips, I’ve got a heat-sink type dealio on my grip plate. This is one of the major complaints I have with the stock VFC thin-type A2 pistol grip that I’m running on my King Arms M4A1 – motors heat up way too quickly without having any degree of heat-sinking features integrated into the VFC bottom plate.
Note that the upper receiver is actually a pretty close clone of the VFC. I haven’t tried putting VFC parts in there yet, will likely need to bug Dizzy or Jester for their VFC M4’s so I can test fit some parts into my HK416.
Pulling the HK416 cluster rail is simple. One screw, and the two blocks (pictured below come off).
Removing the screw allows the rail to come loose – removing the rail from here is just as simple as pulling it forward and off the barrel nut.
Removal of the rail reveals this awesome replica of the piston system that is one of the trademarks of the HK416.
Looks to me like Dboys cloned the VFC clear hop up unit. Too bad it’s junk – lots of play in the hop up arm, lots of wiggle in the adjustment gears, inner barrel wobbles like crazy. I’m replacing mine right after I post this article.
So, moving back to the lower receiver, let’s get to the gearbox. Asides from the rear body pin and the mechbox pin, all that needs to be removed is the mag catch. Dboys actually made this guy out of steel – really nice in the way that it is built more like a real AR mag catch, similar to VFC. However, unlike VFC, the mag catch is actually angled on one side, allows for mags to go into the magwell and catch on the mag catch a little easier. I bought a TM-style Element mag catch thinking I’d have to replace it, but it turns out that the Element mag catch isn’t even steel – it didn’t even catch my mags unlike the stock Dboys one with my MAG 190rd aluminum, Dytac Invader 120rd plastic, and Dboys HK high cap mags (and then it stripped… great).
Onto the gearbox we go. 7mm bearings, surprised me. 3/4 ported cylinder. Clear plastic air nozzle. Plastic selector plate – not like the VFC steel ones, however I noticed no mushy selector issue as with some M4 AEG’s without metal selector plates. Here’s the left side of the gearbox:
Reinforced gearbox shell, painted black. Beige plastic spring guide. Here’s the right side of the gearbox:
Here we go – innards of the gearbox. Grease isn’t overly terrible, though there are weird clumps of it in some odd spots that don’t need grease. Shimming wasn’t great, was a little tight and there was a little bit of grinding. Sector gear has delayer chip pre-installed (I’m going to stick with this gearset till it breaks, it doesn’t look the best IMO, but it’s decent). Plastic piston with second tooth removed, polycarbonate piston head (not pictured) – not sure how it is, I’m not using it anyway. Switch assembly got junked too, in favour for a spare one I had kicking around. Plastic cylinder head with single O-ring with that clear air nozzle I mentioned earlier, definitely an air-leak here. Turns out the plastic spring guide actually has a bearing and is reinforced with some sort of cast metal on the rear end of it. Note that the shell is in fact reinforced on the inside too – I’m going to use it and see if it works without breaking on me with a M120-ish spring.
Am I impressed? Yup. One last pic to show off my new toy…
Externals are as follows: I put on the folding front sight (my fixed, rail-mounted one stripped on me already). Used a Dboys KAC-style vert grip I’ve been using for a while (will use the one included in the box when this one breaks). CA LMT/Crane stock fits well, though a little bit of wobble (more than on King Arms buffer tube, though less than on a VFC). ACM KAC style flash-hider with notch cut for M4QD suppressors. Magpul PTS RSA. G&P functional PEQ-2 (as I’m putting my batteries in the rear, so I don’t need the battery space of the Dboys PEQ-2 battery case included in the box). Black ACM M600C Scoutlight on TSC Gear Sector clone Scoutlight offset mount in tan. ACM clone of the Aimpoint COMP M4 red/green dot sight, using high mount so I can get lower 1/3 cowitness with the HK BUIS. Included Dboys high cap mag, cloned off of the VFC HK416 mag without winding wheel on the bottom (styled after the HK high-reliability magazine, with HK markings and all – super awesome to have on a HK416 clone).
I’m fairly certain that my ACM M4QD suppressor went MIA over the weekend on the field, so I can’t show you a pic of what that looks like. My apologies – too bad that it would look awesome on this gun.