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searchforwisdom 09-02-2007 10:33 PM

ar-15 questions
I was in the military for 6 years. I loved my m 16 A2 very much, and recently decided I wanted to build an AR 15. However I am ignorant of AR 15's for the most part and after the purchase of my first component I have a couple questions.

I bought a gutten lower receiver. It is a Superior Arms 5.56MM.

My questions are:

Can this also fire .223 or only 5.56 rounds?
Where can I find a compatible trigger assembly online? I am unsure if they are all pretty much universal or if I need to buy a specific one for my lower receiver.

Thank you very much for your time.

bkt 09-03-2007 02:47 PM

An AR-15 chambered for 5.56 can fire .223 with no problem. The reverse is not always the case; it is not recommended trying to fire 5.56 in a receiver chambered for .223.

Trigger groups should be universal by virtue of sticking to MILSPEC machining. However, they aren't always a perfect fit. You will pay more for a two-stage trigger group ($130 on up) but you should be able to contact any of the large manufacturers (Bushmaster, Stag Arms, Colt, Rock River Arms, etc.) and order a single-stage trigger group for under $50.

If you buy the trigger group already assembled, it's a drop-in sort of installation. Fit it into the receiver and install two pins.

Clayton 09-04-2007 05:49 AM

As far as the trigger goes, It's only really Colt who have a different size pin in there triggers. I use the Rock River Arms 2 stage trigger in one of my AR's and it is excellent, but you could splash out and get a Chip McCormick, Jewel or Timney Trigger group, Unike the RRA one these are all one unit ready to just drop in.

As for the ammo, It's not reccomended to fire 5.55mm In a .223 chamberd AR

Have a read through this :-

Hope this helps


ARShooter 09-05-2007 06:58 PM

I have put together a few AR rifles and have gotten the parts from Adco firearms They give you the option of differnt suppliers but I have found that the Rock River Kit has served me the best. Adco also allows you to customize the kit with many differnt options. They are prompt with shipping and stand behind thier products. If you are planning on a 20 bbl than I would advise getting the 2 stage National Match trigger. PM me and I can give you a link to a website that has detailed instructions on the assembley of the rifle.

OFADAN 09-06-2007 01:38 AM

The AR is the "erector set" of firearms....there are a ton of different things you can do with start with the end in mind...what EXACTLY do you want with an AR? Home defense, plinker, bunny getter, SPR, Rooney Gun? Once you've dialed in the mission on the AR THEN you can deciede upon the components. There are a dozen or more different triggers, barrels, forearms, stocks, sights, slings...oh my is mind settle on what you want it for then we can better help you dial in the specifics.

Catfish 09-10-2007 11:07 PM

I didn`t build one, but I bought a Rock River and now have 2 uppers for it. Whit the standard upper I fired some ammo I built with the cheapest varment bullets I could and shot a group that measured exactly .700 at 100 yrds. That was also with the cheapest powder I could find and the first load I tried. The loads are for coyote hunting and will be fired off hand so I never tried to get better. I do like Rock River.

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