Reliability and build help for 9mm AR15

[JesseR]

So I did a few searches and found some information but now everything I was looking for regarding a desired build.

I want to build up a 9mm AR on an extra lower I have. I see there are a number of Mag blocks that one can find, Spikes has a new version of their modes on sale right now...

http://www.spikestactical.com/z/index.php?main_page=product_info&cPath=68_71&products_id=188

With the number of mags it will work with and the fact you can adjust it for proper alignment, I think it looks good but wanted to see if there was any feedback on this item.

I understand the DMPS AR-15 LPK and it's included hammer will perform well with a 9mm upper and bolt. Is this correct or I still need to switch out the hammer to a 9mm hammer?

It appears that a 9mm buffer and spring are required for reliability, any other comments here?

The upper, any comments on RRA vs. Model 1 vs anything else? I don't believe I'll SBR this so I'm looking for a 16" upper.

(Why no SBR, simple, the less paperwork with my name and firearms on it in washington, the better..)


Anything I'm missing here that is a big NO-NO or areas I need to pay attention?

Thanks in advance!

Jesse

 

[jcbarlow]

I can't really add any valuable info to your thread other than my opinion/thoughts... I don't think I could build a sweet 9mm ar w/out SBR stamp on that sucker That might just be me though.

 

[mmchambers06]

I don't think I could build a sweet 9mm ar w/out SBR stamp on that sucker That might just be me though.

It is just you. OP is fine to build a 16" gun in whatever caliber he wants.

 

[mmchambers06]

Read Dusty and Rusty's posts in this thread.

 

[jcbarlow]

It is just you. OP is fine to build a 16" gun in whatever caliber he wants.

Absolutely he can, just throwin my .02 cents in Judging by some of the other sick 9mm ar builds it isn't just me.

 

[Spooln-Rex]

well with a 16" barrel that 6 grains of powder will have plenty of time to burn.

either way itd be awesome to have a 9mm ar and be cheapest and more reliable than a sbr version. My .02 cents.........

 

[jcbarlow]

well with a 16" barrel that 6 grains of powder will have plenty of time to burn.

either way itd be awesome to have a 9mm ar and be cheapest and more reliable than a sbr version. My .02 cents.........

6gr of powder has plenty of time to burn in a 4" barrel.
Where you getting the "more reliable" info from?
Not tryin to be a jack@ss...

 

[mmchambers06]

Absolutely he can, just throwin my .02 cents in Judging by some of the other sick 9mm ar builds it isn't just me.

Ohh, heheh...my bad. I read that wrong.

And I agree...I'd have to have a SBR.

 

[mmchambers06]

either way itd be awesome to have a 9mm ar and be cheapest and more reliable than a sbr version. My .02 cents.........

If it were gas operated the longer barrel would make it more reliable...but I doubt it would have any effect on a blowback-operated 9mm??

 

[mmchambers06]

Hmmm...9mm velocity vs. barrel length:

http://www.saysuncle.com/images/9mm.gif

Interesting.