My 6arc build

[StoneHendge]

Thanks I looked at those in the group buy section, but I thought they had mid-length gas. I run everything suppressed, and even though I use AGBs, I generally have better luck with the timing on longer gas systems. I was looking for at least a rifle length 18", or intermediate length 16". Proof probably has more experience with this round than any company and opted for a rifle length 16" and +1 18".

Is your Lilja a mid length? If so do you run it suppressed, and have you had any issues getting the cycle dialed in?

It is a mid length and I do not run it suppressed. I do have it dialed in, but it's a bit of a different creature since I'm using a 2A Arms titanium adjustable bolt carrier and a Taccom Ultralight weight buffer and spring (it recoils like butter and the return to battery dip is almost non-existent). Once I found my load (Varget and 105 RDFs), I haven't played with anything else. And I simply did 100 fireforming loads for break in and then started on that combo. My experience with my 18" 243 LBC with an MLGS is that faster powders result in more port pressure and timing issues.

I'm a big fan of Proof, but I've been beginning to think that all of their different gas systems are a bit of "look at how smart we are" marketing. The fact that they recommend a full Mass carrier with all of their barrels is a bit of a headscratcher to me.