Brand new in the box VLTOR MUR 1A with forward assist. Opened to take pictures and thats it. $400 obo Paul 503-952-6766 The MUR-1A model has a forward assist, it also has M4 feedramps. This Milspec upper receiver will work on all AR-15 models. This is the most rigid upper receiver on the market and also the strongest and most reliable, if you have accuracy in mind this is the way to go.