Hey everyone, I need some advanced tech help with a brand new SRC SR1911 (Green Gas). It completely refuses to fire or release any gas when fully assembled. I have systematically gone through the standard troubleshooting steps with a helper, and we have definitively debunked all the usual culprits.
Here is the exact state of the gun and everything we have proven so far:
1. The Lower Frame is 100% Functional
2. No Magazine Alignment or Gas Lock Issues
3. The Isolated Variable: The Hop-Up Unit
We are at a complete loss of ideas for what is causing the issue, so any help will be greatly appreciated.
Here is the exact state of the gun and everything we have proven so far:
1. The Lower Frame is 100% Functional
- The Test: With the slide completely off the gun, inserting a gassed magazine and tripping the sear works flawlessly.
- The Result: The valve knocker cleanly snaps forward, locks forward via the valve lock pin, and dumps gas perfectly 100% of the time. The grip safety and thumb safety operate exactly as intended. Pushing the disconnector disables the hammer drop properly.
2. No Magazine Alignment or Gas Lock Issues
- Mag Height/Position: Shifting, pushing up, or physically pulling down on the magazine with the slide off makes no difference—the valve knocker has plenty of reach and activates the valve regardless of position.
- Gas Pressure: It is not an over-pressure / light-strike issue; the hammer spring has plenty of force to crack the valve under normal pressure.
3. The Isolated Variable: The Hop-Up Unit
- The Big Breakthrough: If I strip the slide completely (removing the outer barrel, inner barrel, and hop-up assembly) and put the empty slide shell + Blowback Unit (BBU) back on the frame, the gun fires and vents gas perfectly.
- The Conclusion: The failure to fire only triggers when the hop-up unit/barrel assembly is installed in the slide and pinned to the frame via the slide stop.
We are at a complete loss of ideas for what is causing the issue, so any help will be greatly appreciated.
