The 7" Ergo Z Rail is designed and manufactured by Ergo, the real steel manufacturer. Simple yet functional "floating barrel" design does away with the delta ring and hand guard cap, which allows the barrel to "float" unaffected by any movement caused by handling. The result is a much more stable and accurate weapon system.
See closely, the top and bottom halves fit together in a "Z" configuration which promises interlock stability and of course, style.
Suitable for AEG and GBB M4, Carbine length.