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I was watching Future Weapons the other night and they featured the HK 416 as the ultimate future battle rifle. How does this compare to our beloved Sig 556? It appeared to operate in a similar fashion to the Sig so I was curious as to why the HK got so much hype with no mention of the Sig. Just wondering...
 

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...the HK 416 is very similar to the the other DI converted piston guns...such as the LWRC and LMT...the piston rod or gas piston / tappet combination...drives the weapon by striking a bumper located on top of the carrier...this force is considerably "off axis" relative to the reciever's raceway's axis...not good engineering when the carrier is not captured by a railed raceway...as is the SIG 55x for example...the multi lugged bolt uses the AR design...including the "in face" ejector...HK even coppied the "little black extractor insert" found in the AR's extractor cup...

...the HK 416 uses a slightly modified AR carrier with a bumper...



...notice the cam pin...no real change there...



...the modified AR type bolt...at least they got rid of the gas rings...



...the recoil spring and buttstock...





...the one plus is that the HK does use a more robust piston drive than "some" of the others...but the upper reciever is still constructed from aluminum...not steel...precluding the use of a captured steel carrier gliding on hardened steel rails...




... http://www.hkparts.net/shop/pc/viewCate ... ategory=14
 

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...psuminer

...honestly...the 556 is currently the best "assualt type" rifle available...superior to any of the AR conversions...it is more durable...reliable...easier to maintain and has a longer service life...i would recomend you choose it over "any" of the others...

...some information of AR conversions can be found in these linkies...and elsewhere on this forum...the HK 416 isn't any different !

http://www.sigarms556.com/viewtopic.php?t=6119&start=0

http://www.sigarms556.com/viewtopic.php?t=7011

http://www.sigarms556.com/viewtopic.php?t=6930&start=20
 

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Thanks as always Ullie! I did purchase the Sig 556 and just took it to the range this past weekend. LOVED it! 100 rounds and not a hiccup!

I did have one question though: What is the best way to remove the firing pin for cleaning? I can take apart every other piece of the rifle but can't seem to break loose the firing pin. I followed the instructions in the manual but short of taking a large hammer and punch to the notch on the assembly, I can't seem to figure out how to depress the spring and release the pin. Any suggestions?
 

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...lately...some people have been having a problem removing the firing pin stud...the firing pin stud should come out relatively easily...you do need to depress the firing pin though as per manual...try tapping the stud "lightly" with a punch/light hammer while someone is holding the bolt assembly with the firing pin depressed...the stud can be stubborn sometimes...but that is the exception...you can also try heating everything up a little and use some CLP...just very hot to the tough...don't over do it...you might try playing with the position of the firing pin a little while it is depressed also...mabey you'll find a sweet spot...if you can't remove it...or reinstall it easily...i afraid it needs to go back to Sig...

... http://www.sigarms556.com/viewtopic.php ... c&start=20
 

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I pressed the firing pin down on the kitchen counter (on a paper towel) while using a push pin to force the holding pin (whatever it's called) out. Inelegant but got it done.
 

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Hey you have Adam's website up (Hk parts)!

I have a lot of trigger time behind the 416. I feel it is a great gun and combat proven along with Colt M4.

I only have 40 rounds behind a SIG 556 - was so taken with the SIG that I am buying my own this week. At this point I can't justify handing over $4500 for an HK upper. If and when the MR223 comes out I will revisit.
 
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