We're seeing more of the XM177 in the airsoft markett and DTW Airsoft takes a look at the WE Airsoft XM177 GBB Rifle... "This time im taking a look at the WE XM177. This is a green gas powered airsoft rifle with a bit of a kick made by the blowback system (also know as open bolt) The XM 177 is solidly built with enough gas storage in the mag for all that you need, Just a shame you can only get 20 BBs in the VN style magazine they provide you with."