A good look at the Systema PTW Infinity NBORDE XM177E2 Complete Model by Mister Moro, in this Hyperdouraku review... "A video review of ystema PTW Infinity, a complete model that incorporates NBORDE's custom receiver for PTW, XM177E2. The large flash hider is a major feature of the XM177E2. The barrel is 11.5 inches. It was used in the Vietnam War as a precursor to carbines for US special forces such as SEALs and Green Berets."

Read more here and below is the video review: