As the title states, I have a severely undergassed midlength upper that I recently bought from PSA.
I have never really been a fan of midlength gas system from day one anyway, and this just reinforces the reason(s) why, but I wanted to own one for a while to give them an honest shake, but I plan to check to see what the gas port diameter is, and likely will end up opening it up so that it is getting a proper amount of gas to cycle the weapon correctly within the next week.
Here is the first trip out. It was failing to feed, short stroking, failing to lock into battery, etc.
After I came home and cocked the charging handle about a hundred times, it did loosen the bolt up some, and I also installed a different rifle buffer spring that was about an inch and a half shorter and thus was weaker than the spring that came included in the UTG A2 stock.
I also checked the function with a different lower (one that had a collapsible stock, standard buffer and spring) and it cycled the same.
As you can see, that while it is functioning now, it is still ejecting to the 5 o'clock position and in my opinion, just barely cycling properly. Just watch the empties flying over the shoulder and barely missing the face and landing well behind the shooter.
So, to calm my OCD, I will be working on the upper to get the gas more what it should be. The proper wire gauge bits are already ordered.
After a few hours of research, it looks like Sabre Defense 16" Midlengths shipped with .080"-.082" gas port, Spikes recommend going with .076"-.082", Model 1 Sales barrels are at 0.078", Wilson combat uses .085", Noveske uses .080" and Ranier is using .082".
I ordered 2 bits and depending on the port size now, will be using the smallest first, and test fire and if I think it needs more still, I will go back in and do it again with the latter. Just for the record, I am going to use a #47 0.078 and a #46 0.080 respectively.
I have never really been a fan of midlength gas system from day one anyway, and this just reinforces the reason(s) why, but I wanted to own one for a while to give them an honest shake, but I plan to check to see what the gas port diameter is, and likely will end up opening it up so that it is getting a proper amount of gas to cycle the weapon correctly within the next week.
Here is the first trip out. It was failing to feed, short stroking, failing to lock into battery, etc.
After I came home and cocked the charging handle about a hundred times, it did loosen the bolt up some, and I also installed a different rifle buffer spring that was about an inch and a half shorter and thus was weaker than the spring that came included in the UTG A2 stock.
I also checked the function with a different lower (one that had a collapsible stock, standard buffer and spring) and it cycled the same.
As you can see, that while it is functioning now, it is still ejecting to the 5 o'clock position and in my opinion, just barely cycling properly. Just watch the empties flying over the shoulder and barely missing the face and landing well behind the shooter.
So, to calm my OCD, I will be working on the upper to get the gas more what it should be. The proper wire gauge bits are already ordered.
After a few hours of research, it looks like Sabre Defense 16" Midlengths shipped with .080"-.082" gas port, Spikes recommend going with .076"-.082", Model 1 Sales barrels are at 0.078", Wilson combat uses .085", Noveske uses .080" and Ranier is using .082".
I ordered 2 bits and depending on the port size now, will be using the smallest first, and test fire and if I think it needs more still, I will go back in and do it again with the latter. Just for the record, I am going to use a #47 0.078 and a #46 0.080 respectively.
