9mm AR

[tyrist]

Since I cannot have an MP5 I want to make one of my lowers a pistol caliber carbine. Who makes the high grade 9mm uppers. The magazine issue is irrelevant since I can buy whatever mags I want.

[savasyn]

Read through this thread as it lists a number of the various 9mm uppers.

I have the RRA one and am very happy with it. I use the Hytech magblock with UZI mags.

[technique]

Read through this thread as it lists a number of the various 9mm uppers.

I have the RRA one and am very happy with it. I use the Hytech magblock with UZI mags.

+100 kit for UZI mags!!!!!!

[CHS]

Since I cannot have an MP5 I want to make one of my lowers a pistol caliber carbine. Who makes the high grade 9mm uppers. The magazine issue is irrelevant since I can buy whatever mags I want.

The overwhelming consensus on 9mm conversions is to go with Colt style, which you can't get from Colt anymore, so buy RRA which is a Colt clone and very high quality.

Obviously, you can use any AR lower but make sure you get the proper buffer/tube/spring.

DPMS lower parts kits are fully 9mm BCG-compatible, so you can save some money if you get that parts kit for your lower initially, rather than buying another LPK and then buying the proper hammer seperate. If you already have an assembled lower, then you'll want to make sure you have or purchase the proper hammer.

Then just get yourself a mag block for whatever style mags you want to go with, and blast away cheaply!

[grammaton76]

DPMS lower parts kits are fully 9mm BCG-compatible, so you can save some money if you get that parts kit for your lower initially, rather than buying another LPK and then buying the proper hammer seperate. If you already have an assembled lower, then you'll want to make sure you have or purchase the proper hammer.

Interesting. The DPMS 223 hammer/etc will work fine with the RRA kit?

[THE 0NE]

build one they are fun!!!

[savasyn]

From my experience, now that I have one that is safely functioning, the newish CMMG 2 stage works with the RRA 9mm upper just fine, too.

[CWatson]

Interesting. The DPMS 223 hammer/etc will work fine with the RRA kit?

I went with the ramped bolt from ADCO for my 9mm build. That way I can use the upper on any of my 223 lowers without having to worry about the hammer. My understanding is it will work with any 223 hammer but NOT a dedicated 9mm hammer.


CW

[apbrian112]

Interesting. The DPMS 223 hammer/etc will work fine with the RRA kit?

here you go... http://www.ar15.com/forums/topic.html?b=3&f=15&t=108261

it'll work and you don't have to ramp your bolt... it may or may not lead to trigger slap but it will not lock your bolt up. it will allow you to swap out uppers *9mm to 223/5.56 without the trouble of swapping out different hammers and without having to ramp your 9mm bolt.

[tyrist]

I already have 2 lowers with RRA parts kits installed and the ability to switch between uppers is a definate plus. So if I get the RRA 9mm upper I can use it with a single/two stage hammer?

If I have to buy a seperate hammer I will but flexibility is always a plus. Although I don't know how many 5.56 rifles I need.

What is so great about UZI mags?

[technique]

I already have 2 lowers with RRA parts kits installed and the ability to switch between uppers is a definate plus. So if I get the RRA 9mm upper I can use it with a single/two stage hammer?

If I have to buy a seperate hammer I will but flexibility is always a plus. Although I don't know how many 5.56 rifles I need.

What is so great about UZI mags?

Thats what the ramped 9mm bolt is for, so you don't have to worry about changing out the hammer.

[tyrist]

So a rock river 9mm upper with a ramped bolt and I can use it on both my lowers?

What magazines does it use?

[technique]

You pick a mag block that in most cases, excepts Uzi mags

[technique]

Kits look like this



Ramped bolt looks like this.

[technique]

end up like this