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5KU Machined Outer Barrel for TM M4 MWS Series Airsoft GBB Rifles (Style: Carbine / 10.3")

4 Customer Reviews

by John B. on 12/07/2023
"Installed the 10.3" barrel for a MK18 build. Went in with no mods needed, is rock solid and performs well. Can't think of anything to gripe about. Maybe if it was gray phosphate finished steel...but hey. I'd like to find a million bucks on the sidewalk, too. It's a good barrel.
by Francisco J. on 05/02/2024
"Bought this for my Double eagle Noveske N4 (mws clone). The hop up did not fit into the barrel, I had to sand down the inside of the barrel for the hop up to fit. Keep that in mind before purchasing.
by Steve L. on 03/18/2024
"High quality but make sure you pay close attention to your original. I had to do a lot of DIY to make myself be fit with the hop up
by alex b. on 02/22/2022
"Tokyo Marui MWS Carbine - 5Ku 10" barrel length

It's really straight forward to replace the outer barrel, the stock conical brass conical fits over the 5ku snugly and inner barrel/hop up unit fits true and snug. Eye-balling it, the inner barrel, relative to the outer barrel, it's pretty centered. With the stock inner barrel, the barrel falls short by 4.8 mm. Fits into the upper receiver no problem.

Cons:
It isn't a one piece, there are two pieces to the outer barrel, the main base (that inserts into the upper receiver) and the shaft that fits into a cylindrical base of the main base and is secured by two grub screws at 12 and 6 o clock. There is enough tolerance between the base and the shaft that it'll un-tighten the grub screws loose, making the outer barrel wobble. To minimize this tolerance, I've carefully wrapped teflon tap to the shaft which did take out significant amount and blue loc tite the grub screws. Hopefully this'll be a semi permanent solution, otherwise I'll be trying retaining loctite (green) to secure the shaft.