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mr556a1

  1. HK LONG GUNS FOR SALE
    I have for sale a brand new, unfired MR556A1 upper for 1500$ shipped. This is the newest model with the thinner profile barrel and mlok handguard. Perfect for anyone wanting to upgrade to the thinner barrel. I bought a complete MR556A1 a few months ago, but got ahold of an HK416 Upper. This will...
  2. HK LONG GUN TALK
    Greetings all. I'm looking for an 11" handguard (picatinny or m-lock; metal or polymer) that will work for an MR556A1 that has a 14.5" barrel... and has an inner diameter of at least 1.6" (4.06cm). The handguard will have to slide over a welded suppressor that has a diameter of 1.58" to allow...
  3. HK416 and HK417 HQ
    I know the title of this post sounds stupid, but consider me stupid when it comes to AR's. The MR556A1 is my very first! I am a long time owner of HK USP pistols so I know the drill and can disassemble and reassemble them blindfolded (fibbing a little of course), but consider me very...
  4. HK LONG GUN TALK
    I'm the proud owner of a new no box, unfired MR556A1 that came with four HK mags and a HK Factory soft case. I paid $1,894.25 shipped, how did I do? Secondly, I understand the bolt carrier is filed down so as to not function in full-auto. I want to put it on top of my class 3 model 601 so...
  5. HKPRO MEMBERS' GALLERY
    I sense a trend: adding a Trijicon to every HK and clone I own! Pictured are my MR556A1 with 3.5x ACOG, SP5K pistol with 1.5x Compact ACOG, and MP5/40 clone pistol with MRO.
  6. HK416 and HK417 HQ
    For those who have a lot of rounds through their MR556/762s, how have they been holding up for you, and how many rounds have you put through them? I'm especially curious about that infamous chromeless barrel, as there's a popular thread on another forum where a guy who runs a high-volume range...
  7. WANTED TO BUY HK PARTS AND ACCESSORIES
    Hey all, I'm looking for a stripped, or mostly stripped, HK MR556 A1 lower receiver. I really don't need the buttstock or pistol grip, but I wouldn't mind the internals if that's what's available. Please PM me here on the forum if you have one to offer. I'd like it to me in new or as-new...
  8. HK NFA TALK
    All - After inconclusive fragmented search results for this information on this site, just posting to contribute to/enable future searches. Copy of e-mail response from [email protected] received as of 2014.12.11: -------------------------------------------------- ********, the thread...
  9. HK416 and HK417 HQ
    Looking for an ambidextrous mag release for the mr556a1. Can anyone help?
  10. HK416 and HK417 HQ
    Saw in a recent thread that someone would rather have and a5 instead of the new competition model. So I thought whats the a5 blah blah. Looked at an old thread with the same question. Didn't fully answer my question. So what is the difference?
  11. HK416 and HK417 HQ
    I am a new owner of a HK MR556A1 and recently installed a new backplate sling attachment. In doing so, I lost the pressure spring and locking pin (Owners Manual parts: 83.) Stop pin for locking pin Part #233115 84.) Pressure spring Part #233116. What is the purpose of these two parts and...
  12. HK416 and HK417 HQ
    I'm looking at this rail 15" Super Modular Rail MK3 - (DDC) Desert Dirt Color its a nice looking rail but what are its benefits? Why shouldn't I just stick will the default rail that comes on it?
  13. HK LONG GUN TALK
    I've been reading through the couple SCAR16 vs. MR556 threads and I've found some useful information but now that the 556 has been out a awhile, I'm wondering your opinions. Since the MR556 doesn't have M4 feed ramps am I to assume that HK doesn't feel they are necessary or that there is some...
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