Michaelkih, nice video and 60E6. I have an E4, and it is certainly my favorite beltfeed. BTW, the most improved feature added by US Ordnance is their belt pawl to go with the E3/E4 top cover. This pawl increase belt pull, but works well with older E3 or E4, non-railed top cover as well, doesn't have to be US Ord. A couple tips if you are not aware: 1) You may want to keep a dummy round at the end of the belt so the bolt doesn't slam foward and cause premature wear on the op rod's caming tower, and 2) keep a stone around to smooth out the op rod cam tower....reallly a weakness in the design, but it still takes a while to ding them. Bolt and op rod - keep plenty of spares; 60 eats them! http://i395.photobucket.com/albums/pp31/lzxray/IMG_1924_zps766e0d0f.jpg