Description From left to right, Ver. 1, Ver. 2 (Introduced in 2021) and Ver. 3 (Introduced in 2023) Compatibility: Depending on the year they were manufactured, please use this image of upper receivers to determine which version feed tube your MTW uses and whether or not an engine retention clip is also necessary. Version 3 feed tubes are also available in different lengths for M4, MTW-9 and MTW-308. The MTW Shotgun uses the same length feed tube as the M4.
