Neat. That looks like the dedicated Walther-made one. It's IMHO quite a bit nicer than the M&P15-22.
'91 Pickup - Imelda
'08 Tacoma TRD
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche