My VR80 is still struggling to cycle the 1200, but when I run 1300 the magpul carbine stock is collapsing under the recoil (very odd feeling have the receiver come into your shoulder under recoil).
Is the stock issue just a bad stock/buffer tube that has poor lock up, or is this a semi-auto shotgun phenomenon in general? It’s doing it consistently every few rounds, not a 1 time thing.