DTW Airsoft gives his take on the ASG USW-A1 Gas Blowback in this video review... "In this Airsoft review we are looking at the B&T USW-A1 by ASG. This blowback airsoft pistol not only takes the ASG Shadow magazines but also has a the ability to transform into an airsoft carbine at the press of a button. The USW-A1 also has a built in optics mount that is not attached to the slide making it a lot more stable when using red dot sites."