Its the custom mounting bracket from Qloader. It fixes the probem of the clear vl plastic clip side from breaking. Very durable. To lower clip to reset gun simply turn allen screw, rotate q socket a pull down clip. You also need to glue in a piece of plastic L from like a tape or cd case in clip to prevent qloader pods back feeding paint to 1st chain link in front of VL adapter tube.
Advantages:
1. Qloader pod facing right way for quick changes and also on left side of gun.
2. ATS guns perfect for q loader because gun can still be shoot while changing q pods. You still have 11 shots in clip and in tube. All other guns can't shoot while reloading empty q pods.
3. Q pods feed at 30bps and feed chain directly 1 on top of another which prevents chain from being damaged and alows for cycle rate to be increased on the ATS guns.
4. You can really play speed ball now

5. Direct feed which prevents Q Pods from breaking paint. Much better than using qloaders long bendy grey feed hose which allows paint to accerlate too fast when changing an empty pod thus causing older/cheap paint to break.