Since people are talking about upgrades, I have to report that my hao industries bolt that I had set up for ultralight use actually works worse that the stock bolt in the cold. Like way worse ?
Now I'm back to my only upgrades being Daves nub and HSB, a 150% spring, and a laylax 370mm inner barrel and the thing just works even in the cold. Occasionally I'll use a different rocket valve for DMR purposes but the more stock the better it would seem.
I am curious, how many people rate the tan modify bucking? I've heard they have QC issues as of late, and I'm going to run the stock marui until I can't anymore but its good to have options in the bin for when the time comes.