Does your hand feel wet/cold when you shoot it? Do you get a cloud of gas? That usually indicates a jacked up nozzle which just happens with wear and tear. The nozzle is responsible for moving a BB from the magazine to the barrel with each cycle and maintaining pressure between the magazine and barrel/bb when you pull the trigger. Alternatively, the hammer may be falling on the magazine for too long wasting gas though Im not sure where that system would fail. If you remove the slide, you may be able to see broken pieces or cracks. 90% certain this
nozzle would fix your issues. It could be something more obscure but more info would be necessary.
I, personally, like WE products. KWA and TM make a superior product (with sacrifices of their own) but thats about it as far as better replacements go. Airsoft guns, especially gas, are significantly more intricate than their firearm counterparts and, with their low price point, are bound to have failures regardless of brand. Just taking them apart and replacing/lubricating/modifying one thing usually does the trick. WEs price point makes them popular which has lead to strong aftermarket support. The 1911 is a clone of TM, though, so they should have similar/identical hardware available.