TM’s M4A1 MWS already have enough power for Japanese (under 1joule) regulation to begin with. original inner barrel even doesn’t have full length due to that regulation.
Now LayLax PROMETHEUS has two sets of full length barrel for M4A1 MWS for export only line up.
High-strength aluminum for recoil control and durability. And of course high precision inner bore diameter that you can always expect from PROMETHUS.
*this items are overseas sales only, contact your local distributer
■EG BARREL 370ｍｍ
■EG POWER BARREL 370mm