AR help

[22many]

Im a AK guy so bear with me,

Ok, so I got this complete RRA assembled AR lower in a trade. Problem is is that it is registered as a AR pistol. What can I do with this? Can I put a 16 inch barrel and a stock on it or do I have to build it as a pistol?

I know that the majority of upper and lowers interchange so can I just put any upper on it that I want and it will fit?

Also, on my oly arms AR it says "caliber multi". On this pistol lower it says "caliber 5.56". I really dont want to build a 5.56 AR. I would rather do a 5.45 AR or a 22lr or even a 410 shotty upper. Will this work with my lower?

Read More

 

[eldbillbo]

http://www.ar15.com/forums/topic.html?b=3&f=122&t=266557

 

[TonsOfOregonBrass]

http://www.ar15.com/forums/topic.html?b=3&f=122&t=266557

that was a pretty good read

 

[cyclesarge]

You can build a rifle out of a pistol you just can't ever change it back.

 

[22many]

Thanks eldbillbo for the link. Seems I can build my pistol into a rifle. But, that doesnt answer my other questions that I have. The AR15 site jams up my computer so I cant do any searches on that site. Anybody else want to chime in?

 

[cyclesarge]

You can put any upper on it you want, just not a stock (unless you add a 16" or longer barrel), there is no maximum length limit for a pistol. You can legally run whatever ammo will work through your lower.

I am building an AR right now that will have three uppers (4.5" .22LR, 5.5" 9mm, and 10.5 .223) I'll be getting the SBR so I will be able to use a stock. I always thought it would be cool to have one lower that you use with a .22lr and a BMG .50 single shot conversion upper.

 

[Grizzly_A]

Also, on my oly arms AR it says "caliber multi". On this pistol lower it says "caliber 5.56". I really dont want to build a 5.56 AR. I would rather do a 5.45 AR or a 22lr or even a 410 shotty upper. Will this work with my lower?

5.45, .410 or .22LR will work fine, just get the appropriate bolt carrier, conversion/chamber barrel, upper. Also some buffer tube springs "might" need to be changed for the caliber.

 

[22many]

Thanks for all your help. Im really lookin at the AR57 upper.

 

[cyclesarge]

Thanks for all your help. Im really lookin at the AR57 upper.

Also G.T.G.