Budget 9mm AR Build

[O4L]

I'm itching to build another AR. For some reason all of a sudden a 9mm AR sounds like a good idea.

I have a couple of stripped lowers and a couple of LaRue MBT triggers laying around but I need the rest of the parts.

I'm thinking of getting something like this for an upper. What do ya'll think?

https://www.primaryarms.com/fm-products-16in-9mm-complete-upper-with-brake
I know there are different options for the lower as far as mag adaptors. I want to be able to use Glock mags I guess. Any suggestions as far as lower set ups go?

Thanks!

 

[dlbleak]

 

[Buddhaman]

I built my AR9 with Aero Precision parts. Could have saved money with the sales they have this week but I got mine when they first released the EPC9. Great quality though.

 

[jackary]

I picked up one of their complete lowers on sale from Brownells a couple of years ago. Then bought that exact upper later. I like it pretty well it did take a bit to get broken in and I had some feeding issues with fully loaded 33 round Glock mags. After putting a couple hundred rounds through it, it runs great. Foxtrot mike complete lower and upper.

 

[El Pablo]

I'm itching to build another AR. For some reason all of a sudden a 9mm AR sounds like a good idea.

I have a couple of stripped lowers and a couple of LaRue MBT triggers laying around but I need the rest of the parts.

I'm thinking of getting something like this for an upper. What do ya'll think?

https://www.primaryarms.com/fm-products-16in-9mm-complete-upper-with-brake
I know there are different options for the lower as far as mag adaptors. I want to be able to use Glock mags I guess. Any suggestions as far as lower set ups go?

Thanks!

You can use one of your lowers, and a magwell adaptor to adapt to glock mags. Better idea is to get a dedicated lower as others have mentioned. Doing a 9mm direct blowback and you need a heavy buffer, so more pressure on the trigger. As such they usually recommend triggers specifically for 9mm. I can hook you up with a cmc single stage 9mm trigger. I have cmmg roller delayed so I can go regular triggers as I can use normal buffers.

 

[GlockPride]

I’d definitely go with a dedicated 9 lower and not an adapter. I’ve never heard of 9mm AR trigger…

 

[El Pablo]

I’d definitely go with a dedicated 9 lower and not an adapter. I’ve never heard of 9mm AR trigger…

Yep, may just be too cautious… but it’s a thing. Some vendors rate their triggers for it, others have special ones. I have no idea if it’s a real risk.

pewpew briefly talks about it. 5 Best Pistol Caliber Carbine (PCC) Triggers

 

[dennishoddy]

I run a Timney AR competition trigger in the quarter circle 10 dedicated lower using Glock mags with zero issues for over three years now.

 

[El Pablo]

I run a Timney AR competition trigger in the quarter circle 10 dedicated lower using Glock mags with zero issues for over three years now.

It appears it may also depend on how the bolt carrier group is cut. So, who the heck knows.

 

[dennishoddy]

It appears it may also depend on how the bolt carrier group is cut. So, who the heck knows.

That could be the case.