Originally Posted by
taekwondopreacher
Short answer: Open tined, but neutrally timed. LMT enhanced carrier, Sionics NP3 cam pin, standard Sionics Bolt. Using Sprinco Green buffer spring.
Subjective notes: Shot 55 more rounds today of full power reloads of 55gr FMJ and 62 gr BTHP, plus M855. In prone or kneeling, irons settle where you started if your fundamentals are good. Best way to describe Aimpoint dot movement: dot seems to hop up and to the right during recoil, and settle back center mass with the bolt closing. (I don't ride the handguard very hard. Don't want to get used to one rifle and overdrive a different one. ) I have a bit of time riding the recoil shot-to-shot with A4s wearing ACOGs doing CQB drills, and it has a fair amount less movement than that. By no means SF brake restriction of movement, but I don't enjoy my SF brake without the can attached. The Rifle does have a SLR AGB, but it turns out to be a pointless addition in hindsight. It's not turned down much, if at all, in case I end up with only lower quality ammo available. It'll cycle PMC. I do think if I hadn't neutrally timed the WarComp that it wouldn't show dot movement to the right. Just a little hop upwards.
Edited to add spring selection.