AR build advice

[mills0713]

I'm in the process of building my first AR. I have a LMT Specwar upper with 12.5 barrel, mid gas. After reading the "The Gun Every American Should Own" thread, I feel like a made a good choice. The lower will be a stripped LMT Mars-L (I shoot lefty and like the ambi controls). This will be a SBR (no brace). I also have a CGS Helios DT supressor that will live on this rifle. I will be shooting handloaded 77tmk or 73 eld-m.

Question: What buffer system should I use for this setup (buffer and spring)? Because I shoot lefthanded, I want to minimize gas as much as possible without sacrificing reliability. Again, I will not be shooting unsuppressed.

There is a lot of info on Reddit. I trust the folks here more. I'm completely new to this world, so treat me as such.

Thanks in advance.

 

[Formidilosus]

I'm in the process of building my first AR. I have a LMT Specwar upper with 12.5 barrel, mid gas. After reading the "The Gun Every American Should Own" thread, I feel like a made a good choice. The lower will be a stripped LMT Mars-L (I shoot lefty and like the ambi controls). This will be a SBR (no brace). I also have a CGS Helios DT supressor that will live on this rifle. I will be shooting handloaded 77tmk or 73 eld-m.

Question: What buffer system should I use for this setup (buffer and spring)? Because I shoot lefthanded, I want to minimize gas as much as possible without sacrificing reliability. Again, I will not be shooting unsuppressed.

There is a lot of info on Reddit. I trust the folks here more. I'm completely new to this world, so treat me as such.

Thanks in advance.

That is an excellent upper/lower, and an excellent suppressor.

H2 buffer and spring. You will be over gassed suppressed as that upper was specd around absolute reliability at -30° F unsuppressed. However it reliably functions at 120° F unsuppressed with very hot ammo as well. If you want less gas, the best answer is a Black River Tactical reduced gas tube.