MR556 Can we get a 14.5" barrel with a pinned 1.5" flash hider for CA compliance?

6048 Views 8 Replies 5 Participants Last post by Grumpy, Feb 4, 2012

Liberty1979

Discussion Starter · Feb 3, 2012

MR556 Can we get a 14.5" barrel with a pinned 1.5" flash hider for CA compliance?

If I wanted to get a MR556. to be California compliant with 16"oal. is it possible to pin a 14" barrel with a 1.5" flash hider? if so. how do i go about this? (416d upper pinned? w/mr556 lower?)
Is this even possible?
thanks folks!

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zpak

· #2 · Feb 3, 2012

Liberty1979 said:
If I wanted to get a MR556. to be California compliant with 16"oal. is it possible to pin a 14" barrel with a 1.5" flash hider? if so. how do i go about this? (416d upper pinned? w/mr556 lower?)
Is this even possible?
thanks folks!

That's an affirmative.

Check out your local gunsmiths, find one who will do it for you. In SoCal, I know of many places. My friend is running an LWRC TriCon with a pinned flash hider. Actual barrel length is less than 16 inches, but with the pinned hider, he's totally compliant/CA legal.

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Massan

· #3 · Feb 3, 2012

As far as I know MR556 only comes with 16" barrels so if you want a pinned 14.5 barrel you will have to get some barrel work done on it. And the 16" barrel length isnt only CA compliance, its Federal. Two big names in getting barrel work done on the MR556 right now(as far as I know) is Jayson at IGF(having mine done by him) and Marvin at Nefarious Arms. Either of them can cut it down to 14.5 and pin a muzzle device for 16" overall.

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zpak

· #4 · Feb 3, 2012

Massan said:
As far as I know MR556 only comes with 16" barrels so if you want a pinned 14.5 barrel you will have to get some barrel work done on it. And the 16" barrel length isnt only CA compliance, its Federal. Two big names in getting barrel work done on the MR556 right now(as far as I know) is Jayson at IGF(having mine done by him) and Marvin at Nefarious Arms. Either of them can cut it down to 14.5 and pin a muzzle device for 16" overall.

Liberty said he had a 416D upper?

That being said...are the other parts of the 416D upper CA-compliant? (FA-capable?)

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Grumpy

· #5 · Feb 3, 2012

If you want to use the pre-existing flash hider to pin and weld, have your MR556 barrel cut back to 14.7 inches. If you want to use a longer flash hider, such as the phantom, vortex, one of the suppressor mount flash hiders such as the Gemtech Bi-lock or AAC Blackout, Ops. Inc. 12, etc, it's ok to cut back to 14.5 and perm attach.

I did my own barrel work and found it to be much cheaper, although the names listed above do fine work and if you don't hae access to a shop, their services are well worth it.

I'd also suggest having the profile changed as well (either mid-weight or light weight) if you're going to go through all the effort to have it cut down. You won't be sorry.

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Liberty1979

Discussion Starter · #6 · Feb 3, 2012

zpak said:
Liberty said he had a 416D upper?

That being said...are the other parts of the 416D upper CA-compliant? (FA-capable?)

I thought the lowers were where we got tricky in california as it has the options for select fire. and the upper didnt matter? trying to stay legal here as best i can. given these WHACKY ass laws. and want to check with the hk crowd before i go off to my FFL.

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SEAINC

· #7 · Feb 3, 2012

Hi Liberty1979, try CALGUNS.NET and you will get more CA specific advise. Thanks

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zpak

· #8 · Feb 4, 2012

Liberty1979 said:
I thought the lowers were where we got tricky in california as it has the options for select fire. and the upper didnt matter? trying to stay legal here as best i can. given these WHACKY ass laws. and want to check with the hk crowd before i go off to my FFL.

Well, I don't know how sticky/picky CA gun laws are going to be if you have a non-full-auto lower mated to a full-auto capable upper. In fact, the bolt carrier for the 416 is different than the MR556, allowing for "select fire".

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Grumpy

· #9 · Feb 4, 2012

zpak said:
Well, I don't know how sticky/picky CA gun laws are going to be if you have a non-full-auto lower mated to a full-auto capable upper. In fact, the bolt carrier for the 416 is different than the MR556, allowing for "select fire".

"Normal" bolt carriers are fine in CA.

The carrier does not "allow" for select fire. It is merely a part in the rifle.

There was some issue with this after Colt decided some years back to start removing the bottom section of the rear of the carrier. When they did this, it let some less then knowledgeable people to start saying that full shroud carriers were FA parts and thus illegal. This was wrong then, and remains so to this day.

The original SA carrier was designed this way as well and the fact that the 416 carrier retains this feature means nothing in the greater scheme of things. To be sure, HK's addition of the barrel extension "tab" and the cooresponding cutout in the carrier as well as its further cut back rear section are probably sacrifices to the gods of US "sporter" import regulations more then anything else. As it were when I removed my MR556 barrel for re-profiling, I removed the tab so if/when I get a 416 carrier, it will fit just fine.

Now if you were to start drilling extra holes in your lower and adding different parts to the lower, then this discussion takes a turn for the worse when discussing legalities.

But, since we're talking about non-FA lowers, any discussion as to the legality of the internal parts of an AR upper receiver is a moot point and a waste of time.

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