5KU aluminum outer barrel for Marui M4 MWS gas rifle (10.3 Inches M4 Carbine)

New amazing aluminum custom part
hi quality construction with hard anodized finish.
Rear screw stud to adjust the final length.
MilSpec collar to easy install all these spare rail handguards.
To install the original MARUI M4 rail a new real type delta ring is necessary!
Suitable for MARUI MWS/MTR gas rifles series.
Length: 258mm.