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  1. For Sale HK MR556

    HK LONG GUNS FOR SALE
    For sale is a HK MR556 bought in 2020 in older MRS hand guard. Comes with a 1x30 round steel magazine, manual, soft bag, iron sight, and safety lock. Fired 120 rounds since new. Oiled and cleaned regularly. Comes with a UTG OP3, canted sight mount and other accessories. DM for more photos due to...
    $2,600 USD
  2. HK416 and HK417 HQ
    Hello everyone! I am hoping to find some pictures of Geissele 10.5 HK416 Super Modular Rail M-LOK in the wild. My brother has MR556, and wants to put this rail on, but we cant find anything online to see how it would look like. Thank you!
  3. WANTED TO BUY (WTB) HK FIREARMS
    WTB Stripped MR556/HK416 upper.
    $380 USD
  4. HK LONG GUNS FOR SALE
    Selling/trading my HK416 Upper and Aero Lower. I got the upper from another member here who put it together. It has a 14.5 P/W Brownells Barrel with surefire compensator, A5 upper, Vented GB, TD416 chrome BCG, and PRI Gas Buster CH. lower is an Aero with milspec trigger and H3 buffer and mil...
    $2,300 USD
  5. HK416 and HK417 HQ
    Suddenly seeing a few new CC date code MR556's popping up with what appears to be factory cerakote in FDE. The HK engraved is solid instead of an outline like on older models which I found interesting. Initially thought this was an aftermarket cerakote and re-engrave job but then I found at...
  6. HK416 and HK417 HQ
    Curious if anyone has any info on this phenomenon: I've noticed over time either from my random gun shop perusing, my own aquisitions, or my experience working in an FFL that sometimes a factory HK MR rifle will have serial numbers in some of the various locations HK likes to put them that difer...
  7. WANTED TO BUY HK PARTS AND ACCESSORIES
    condition is not that important as long as it's functional
    $150 USD
  8. HK416 and HK417 HQ
    May have been asked before, but why is the flat top reciever so high on the MR series rifles? I realize its one of the things that distinguishes them from all the other ARs out there but jw if theres a reason they made the rail section so tall.
  9. Sold MR556A1

    HK LONG GUNS FOR SALE
    For sale is a like new, unfired MR556. This gun has no flash hider - it originally came with an OSS silencer that has been sold. It comes with an HK soft case & one magazine. I'm asking $2,795 shipped. A discount will be offered for a local sale. Payment via PayPal F&F, Venmo, cash, check, or...
    $2,795 USD
  10. WANTED TO BUY HK PARTS AND ACCESSORIES
    Hi Guys, Looking for a Nefarious Arms Upper receiver assembly tool that Marvin produced back in January. Does anyone have one they no longer need? Maybe you used it one time, didn’t get around to using it, maybe it’s just sitting around in the corner somewhere…? I hear there more being made...
    $100 USD
  11. WANTED TO BUY HK PARTS AND ACCESSORIES
    Looking for this part to help me finish an IAR clone. $50 OBO (Don't mean to lowball, now sure what these are worth right now), link below for part picture. Thanks! https://hkparts.net/product/mr556-416-mr762-417-german-e1-convex-butt-pad-p1915.htm/
    $50 USD
  12. HK PARTS AND ACCESSORIES FOR SALE
    These are Colt full auto bolt carriers that have been modified to work in the HK416 rifles or MR556 that have the auto deny tab removed. They allow you to use AR15 bolts firing pins cam pins and lower your maintenance costs. This is ideal for those building a 416 or converting their 416 or MR556...
    $400 USD
  13. HK LONG GUNS FOR SALE
    I really, really don’t want to post this, shifting financial priorities say otherwise. Up for sale is my CB stamped MR556, HK mags, original soft case, manual, lock, and HK tool. It has only had 80 rounds fired through during one session has been a safe queen since as I was waiting for a...
    $3,200 USD
  14. HK PARTS AND ACCESSORIES FOR SALE
    WTS brand new keymod rail. Comes with two rail attachments. No screw, can be had on hkparts for $10. $75 to your door Like new Troy BUIS. HK416/MR556 height. $105 for the pair. $155 for BUIS and rail to your door
    $75 USD
  15. HK PARTS AND ACCESSORIES FOR SALE
    SOLD MR556/416 Bolt Catch-OEM new SOLD MR556 Front Takedown Pin (push pin release)-OEM used $30 SOLD MR556/416 Magazine Catch assembly-OEM new SOLD MR556/416 Disconector-OEM new $12 MP5SD Rubber Handguard-Unkown if OEM or USA-used with some deterioration around the clip holes and notched...
    $30 USD
  16. HK PARTS AND ACCESSORIES FOR SALE
    Edited 7/22/2022: Added a few more items for sale Edited 9/5/2022: Price adjusted, complete upper and sp5k parts sold Edited 9/13/2022: FCG sold 1. Brand new unfired MR556A1 complete upper, 2022 CC date coded with the light contour barrel profile and 12.5" M-Lok handguard, does not come with...
    $330 USD
  17. HK416 and HK417 HQ
    Just wanted to make certain that the threads I have read are correct or wrong? I rather buy an upper, but if I was knowledgeable then I could save money, be in the know, and have an easier time finding parts. I plan on getting a @HAUS MANUFACTURING LLC upper or parts. I have seen the following...
  18. HK PARTS AND ACCESSORIES FOR SALE
    Brand new in bag. $65 shipped each. 1 left Zelle, Paypal FF or GS (+4%), Venmo, USPS MO
    $65 USD
  19. HK416 and HK417 HQ
    Update Edit: The rifle is fine. None of the listed issues are actual issues. More detail below. Just bought my MR556. I’ll start with it is an amazingly solid feeling gun. Can’t wait to take her to the range. However I have a couple of issues/questions. Is the list below normal or the same on...
  20. New Member Introductions
    Hello! New to the forum. Currently working on an Hk416 build and getting pretty close to finishing. Hoping the forum can help with that!
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