"Have I restricted the gas flow too much and it's short stroking" strikes me as this yes. My assumption is the bolt isnt going back far enough to get enough compression on the spring to get the energy to close, id give it a wee bit more gas?
My AR gets slower as it gets dirty and starts to get more suseptable to this issue after a few hundred rounds, a quick lube of the bcg and its fine again.
With the plastic spear mag I have I once was a bit to enthusiastic and managed to make it go in a bit far, gun sulked, never happens on a steel mag, so I wont buy another one.
Bookmarks