BOTW: Concept HK416

    Our second installment of the new Build of the Week feature was submitted by Victor (from Brazil). This is a concept “dream” build that he sent in with the hopes of someday being able to build out a version of it (he has sent in four revisions so far)…  I know we have some HK nerds that read this blog, so help him out in the comments with pros and cons of the components, the feasibility of the build, etc.  There is a lot going on in the below list. (and costs were helpfully included).  We’d thought this may have also been posted somewhere on, but couldn’t find the post if it was…

    Again, we have had a pretty good number of submissions.  I am posting in the order in which I receive them (multiple different builds from the same person will be spread out, no more frequently than once per month).

    If this series continues to grow and sustains for a few months I think we might be able to work in something very cool.

    You can submit your own build at

    This is a dream gun based on the the first firearm I ever fired, at Lock & Load Miami: a select-fire HK416 (it was too heavy, with a heavy profile 14.5″ barrel and a quadrail, really bulky stock and I hated that little piece of plastic sticking out at the front of the pistol grip, but I still loved the gun). I’m Brazilian and only 19 years old, so I still have time until I get my hands on a Government issued HK416A5 in use by COT-PF (if everything works out just fine, I’ll become the Brazilian equivalent of an FBI HRT BEARDED operator. That must be real badass). But let’s focus on the build. It’s supposed to represent an MR556A1 with all the markings found on a military contract HK416 (s yeah, it’s a clone build, but the MR556A1 is legit. The only things left from the original firearm is pretty much the lower receiver. At there is a really cool item labeled as “HK416C Style Upper Conversion Kit”, with an 8″ barrel and shortened piston system. Here’s a list of the modifications:

    • Hk MR556A1 2,600.00
    • MR556 & HK416 Upper Conversion Kit – 8″ – HK 416C Style (No muzzle device) 875.00
    • Randall Rausch Full Barrel Profiling 60.00
    • IGF 416 Barrel Markings 145.00
    • Area 419 Barrel Fluting – Heavy Diamond 185.00
    • IGF Standard Titanium Barrel Nuts 195.00
    • IGF Titanium Gas Piston – Single Ring 95.00
    • HK German HK416, MR556 Ejection Port Cover in RAL8000 – Polymer 30.00
    • Schuster Forward Assist Plug Delrin AR-15 9.00
    • Radian Weapons Raptor-SD Ambidextrous Charging Handle AR15/M16 NP3 Coated 104.00
    • Troy HK416 Rail, Carbon Fiber, 9″ – CAR 349.00
    • Geissele Automatics HK MR 556 Trigger 460.00
    • PDQ Ambi-Bolt Release 60.00
    • HK 416 Ambi Magazine Release 64.00
    • Magpul Enhanced AR Magazine Release (right) 18.00
    • HK 416 Selector Safety Set Lever RAL8000 55.00
    • BAD-ASS-ST Short Throw Ambi Safety Selector AR15 / AR10 81.00
    • HK416 & HK MR556 HK416A5 Style Trigger Guard – RAL8000 40.00
    • HK V1 Battle Grip 37.00
    • V SEVEN Titanium QD Endplate – Black 36.00
    • V SEVEN Titanium Castle Nut – Ionbond Black 34.00
    • CMMG AR15, RipsStock Compact Stock Assembly (5-position) custom machined w/ H&K`s
    • OTB Draining Holes 200.00
    • IGF Auto Picto Engraving 345.00
    • Magpul PMAG 30 AR/M4 GEN M3 Window Black 14.00
    • Delta P Design BREVIS II 5.56 Ultra 1,500.00
    • Arisaka Vertical Grip M-LOK 32.00
    • EOTech Model EXPS3-2 Tan 629.00
    • EOTech Model G33.STS Magnifier Tan 489.00
    • SureFire M300V — IR Scout Light – Tan w/ DS07 514.00
    • Steiner OTAL-C IR Class 1 Laser 400.00
    • BFG Custom Vickers Sling – Coyote Brown/ Coyote Brown/ Wolf Gray
    • Push Button Sling Swivel / Push Button Sling Swivel / Nylon – Coyote Brown
    • Sew in Hardware/ Threaded On 84.00
    • Arisaka QD Mount M-Lok 23.00
    • Magpul M-LOK Aluminum Rail, 5 Slots 20.00
    • Law Tactical Folding Stock Adapter – FDE 250.00
    • ROBAR NP3 Plus Finish:
    • HK Bolt & internal parts 170.00
    • Trigger assembly (steel or stainless steel only) 55.00
    • DuraCoat Finish: Urban Dark Earth – Handguard 27.00TOTAL: $10,284.00

    The ideal chambering would be 300 BLK, but as HK loves us so much, we probably won’t ever see a civvy version of the HK337. So for NV shooting, truck gun, HD and low vis PSD, my go-to SBR remains the SIG Rattler in 300 BLK.

    Cheers, James (or Tom, or Pete, idk, I just wanna say that I love you all).

    Sincerely, Victor

    Tom is a former Navy Corpsman that spent some time bumbling around the deserts of Iraq with a Marine Recon unit, kicking in tent flaps and harassing sheep. Prior to that he was a paramedic somewhere in DFW, also doing some Executive Protection work between shifts. Now that those exciting days are behind him, he teaches wilderness medicine and runs an on-demand medical staffing business. He hopes that his posts will help you find solid gear that will survive whatever you can throw at it–he is known (in certain circles) for his curse…ahem, ability…to find the breaking point of anything.

    You can reach him at tom.r AT or at