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Discussion Starter · #1 ·
Well I just purchased a Ruger AC556, but it will be a few months until my dealer completes the transfer. It's the blued version, short barrel, with factory folding stock and flash hider.

I have owned and dissasembled many guns, but this is my first experience with a ruger mini14 type gun, so I have several questions. First, there will be a couple of things I will want to rebuild on the gun, mainly the gas port that feeds into the bolt carrier. Where can I get one of these? Will it be different for the short barreled AC556, or are they all pretty standard? How difficult is it to change out one of these things, and what's involved?

Also, I would like to replace the standard short barrel with a heavy short barrel - is there such a thing, and if so, where can I get one? Thanks, guys for any help you can give me on these topics.
 

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Sadly, the AC556 seems to be out of reach for poor SOB's like myself. Not a LEO, not military :( . Wish I could help you, but I have no experience with 'real' assault rifles.
 

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Welcome Red, and congrats on your new purchase, we may be able to steer ya in the right direction for the answer to your questions. Is your Ac556 brand new? If so it will come with a manual. If not request one from ruger ( They will send you one for free). Once you have a manual you can compare part # in question with our simple mini's to see any differences. I believe the part your referencing is what ruger calls a Gas Port bushing (we call it gas bushing). It is common to the barrel, and Gas Pipe. This gas bushing is what controls the amount of gas which is fed into the gas pipe, which is fed into the Slide Assembly which operates the bolt etc. NW Shooter Support i.e. [email protected] Makes a Gas Bushing Kit i.e. 3 different size bushings to adjust the recoil. $25. It is easy to change out. My mini thru brass 60 ft. After I installed the bushing kit and adjusted recoil to 10 ft. I can get on the follow up shot real quick now. The instructions come with it. If your part # is different than ours Mike may still be able to fix ya up. There are companies that can install a bull barrel for ya. I don't believe there is a drop in bull as the gas block has to be drilled out, etc.
But before you go do all that you might just want to shoot it as is, you might like it just the way it is. Just find what ammo it likes, and see what she will do for ya.
 

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Discussion Starter · #4 ·
when I purchased the AC556, I asked the dealer to dissasemble the gun, which he did. And he also dissasembled a Mini-14 at the same time to compare the internal parts. From what we could tell, the trigger pack (fire control parts) were substantially different - the AC556 has the tri-burst so it had a number of additional parts for this feature - the trigger pack frame was therefore slightly wider than the Mini's trigger pack. You could not easily interchange these parts between the two guns. The bolt and bolt carrier, and gas system appeared identical, but I'll have to take a closer look when I get possession of the gun. It had a neet little push button selecter switch on the rear of the receiver and what appeared to be an auto-sear that looked like it was tripped by the boltcarrier handle. The receiver frame was wider on the AC556 where the trigger pack inserts. Other than the selector switch and the widened area on the receiver, the receivers otherwise looked identical.

It was interesting to compare the internals of these two guns - I didn't realize the number of small differences between these guns, which looks almost identical to the gb folder on the outside.
 

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It sounds like a beauty Red! Having been in heavy industry for many years, sometimes parts will appear identical, but the part numbers will be different. If the part numbers are different, there is a reason, but if there the same the parts may be interchanged. How come you have to wait so long, is it for back ground check for the permit? I know from experience sometimes it can take a while.
 

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Redchip,
You're leagues ahead of me. Could you give us a full report on your new shootin' machine? You can borrow my mini for comparison, though I reside in the Homeland of Socialist Kalifornia.

KC
 

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Discussion Starter · #7 ·
Here, where I live, I have to get the local Sheriff to sign off on my form 4. The process is tedious, but it will be worth it! I had to go get passport photos - did that yesterday. I tried to get the fingerpring cards completed at the passport photo place, but they won't do finger prints dealing with firearms. So, I have to make an appointment to get fingerprinted by the Sheriff's department. After all of that is done, then I give my local Sheriff the completed application, and he will conduct a local background check on me. If he likes me, I guess he will sign off on the form 4. Then I need to submit it to ATF, and I hear the wait is 2-3 months. Once I get the OK from ATF, I can pick up the gun.

Regarding the differences between the AC556 and Mini14 - where were quite a bit more than I had expected. It's not like comparing a full auto M16 to an AR15(SP1 type anyway). I think the biggest differences is due to the tri-burst mechanism - I'll have to examine that more closely when I get posession of the gun. Does anyone know if Ruger made any AC556's without the tri-burst feature, just full auto and semi?
 

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I don't even know how a tri-burst works. How do it know when it has fired 3 rounds? Maybe you can analyse this for us, or does someone know the answer offhand? Full-auto, I can understand.

As far as I know, Ruger did at one point make a full-auto as well, but don't quote me on it.
 

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Discussion Starter · #9 ·
From what I briefly examined, it has an extra 2 or 3 parts in the trigger pack that acts as some sort of ratcheting mechanism. I'll have to examine it more closely when I get it.
 

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Redchip,

I just got one too. Paid $3000 and came with 8 factory 30 rounders. Mine is the long version with full wood stock. Form 4 came in just the other day. I will pick it up Monday.:D A trip to the range will soon follow. Funny thing is I haven't owned a Mini-14 for about 8 years. It's the best value in 5.56 full auto.
 

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goodorbit,

That is kinda how it works on the AC. It is hard to figue out exactly what is going on in there, but I'm working on it.

I just took mine out to the range today for lunch. I just picked it up yesterday, so this was the first run. Only had 120 rounds so it was short. All functioned 100%. I do need to check into that gas bushing that everyone is talking about. It tends to climb quite a bit more than the M16 IMO. If I can reduce the recoil that would be great. This thing is just too cool! You guys need to sell all your guns and buy a machinegun. You can always drive a Yugo or something. What a rush.
 

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Discussion Starter · #16 ·
want to keep in mind. I've been told to be very careful reassembling the AC556 after taking it apart. The triburst mechanism must be in a particular position for it to be reassembled. If it is not exact, you could end up damaging part of the tri-burst mechanism. My understanding is that you need to check its functioning by moving the action by hand after reassembling.

Question; when did you submit your form4 to ATF - i.e. how long from when you mailed it off to when you were notified to pick up the AC556 by your dealer? I mailed mine off in May - still waiting, very eagerly, trying to be patient!
 

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Redchip,

I heard the same thing about the selector. Read you manual when you get it. It is very clear about how tho do it right. It does not like to go back together very well. The sellector MUST be in semi-auto, and the trigger pack as well. Even then takes me a little wiggling to get right.

I sent my form 4 on June 6 it arrived at the sellers mailbox July 17. I did a person to person transfer, so no dealer. Also, the owner of the gun is now a trust, so no fingerprints or background check. That makes it go faster. Hope yours comes soon.
 
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