A second m4 style upper receiver to put my xm177 front end on. Heresy it may seem but the 177 upper is slightly too long for a WE m4 lower, fits the 416 lower though interestingly. Surprised the 416 upper won't fit an m4 lower. Or maybe I should just keep the 416 lower of the xm177 upper just to really fuck with the traditionalists.
Also bought some GHK silicone oil and maple leaf hop rubber as Ed said his scar was great with one. Picked up he maple leaf omega hop nub to try out too.
Got an fg Airsoft nozzle return spring, not had issues with the stock one but it's gbbr so spares are always handy, and finally a set of fg airsoft low flow system things to limit power. The npas system is OK but not great or ideal so hopefully these will be a tad more reliable.