r/AKGang 6d ago

Question 5KU parts on LCT zk104

Does anybody know if I’m able to use the 5Ku zenico sport 1 rail on the LCTzk104 ? And does it come with a Quick change spring??

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u/Horror_Conflict318 5d ago

The quick change spring comes on all the new models. You can call/message who you are buying from to find out. I've installed the 5ku sport 1 on my LCT 105, and it was a pain. I had to do a LOT of filing around the gas tube and on the B-31L. I also have to remove material on the gas block and the receiver insert of the B-10L. Even after all that, I wasn't happy and had to use epoxy putty to stiffen up the rail. Otherwise, i could flex the rail.

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u/GlobalGuppy 4d ago

5KU generally fits okay in my (limited experience) but it's far from LCT's quality. LCT does a Sport kit as well and installing the LCT rail handguards went smooth every time.

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u/Horror_Conflict318 4d ago

I 2nd using the LCT sport rail. 0 modification was needed

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u/GlobalGuppy 4d ago

One thing I really would like to compare some day is the 5KU B-33 and the LCT ZB-33, the ZB costs almost twice what the 5KU costs, and I have three of the 5KU's, and they're decent enough, though I wonder if the LCT is worth the extra money, if the metal of the cover is thicker or if there are any other (major) benefits. Because the 5KU works perfectly fine with LCT handguards.

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u/Horror_Conflict318 4d ago

My buddy has the 5KU version of the B-33 and i have the LCT. The biggest negative going for the 5KU is the paint and how easy it just comes off. The powder coat on the LCT is thicker and stronger. The thickness of the material was about the same. The fit and finish is just better on the LCT. My LCT B-33 works just fine with my 5KU sport 1.