Custom H&K SL8 No it isn’t a G36, it’s an SL8 converted to mimic it’s original form. The lower/pistol grip and stock attachment point are all one single piece. It’s a cheap drop in conversion that allows actual G36 stocks to be used. It does however add a longer length of pull. You can see the small “window” on the receiver where the SL8’s serial number is required to be visible. The G36 does not have that “window”. Also note that the barrel is not contoured; it still has the heavy profile but was threaded to accept a flash hider.