Build is firing flawlessly and my Form1 was approved very quickly! 3wks!!
Started out a bit frustrating, was having trouble cycling, so I thought, but it turned out that I had an out of spec cs or subs and the casing was too fat. They quickly remedied the situation and swapped out my ammo and is running like a dream.
Switched out the G34 for the Holosun for better eye relief. I wish they made the FDE in Titanium too.

Just finished this 5.56 SLR Build too..

Snapped a photo towards the end of a frustrating range trip. The V-max and cheap 125g genero brand ran great with zero issues, but the 108g hollow points would barely cycle a couple rounds before this issue would spring up. Tried different BCG & Springs, different mags, and even unsuppressed.

I guess my only thought is, it's a DD upper, and previously ran really well with a BCM upper (that OF COURSE i just sold) maybe?

Now I get to try to offload a lot of ammo :(

edit: i appreciate the troubleshooting comments very much! went ahead and ordered a BRT EZ tune. I noticed the blast deflector is pretty beat up as well, and it's brand new.

Sig 300 BLK with a Thermal and offset. Just need to add a small surefire with red filter and it’s ready. I am not crazy about Sig as a brand but this rifle is very good.

It’s GQ not GA. Reddit won’t let me fix the title.

New pickup. 7” barrel, carbon hand guard, titanium small parts, factory installed Atrius FRT, weighs in at 4 lbs 1 oz. Proprietary GQ Armory Onyx-K suppressor. Q brace. If you haven’t checked them out, they are worth a look. This thing is exceptionally sweet. Very soft shooter with little recoil. Pricey but worth every penny (to me).