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Review
Did the channel liner replacement in conjunction with an upgrade to a Titanium Performance Firing Pin Assembly. Removal of the OEM channel liner was easy using the removal tool. I was concerned when the new stainless steel liner just dropped in and didn't have a snug fit like the OEM version did, so I sent my concerns to the MCarbo Support Team and they quickly responded with this info: Is the Loose Fit by Design? Yes — the slightly looser fit of the stainless steel channel liner compared to the OEM polymer one is by design. Here’s why: OEM Glock channel liners are polymer, which allows them to expand slightly when pressed into the slide channel, creating a very tight friction fit. Stainless steel, however, does not expand or compress in the same way, so a slightly looser tolerance is engineered to: Prevent galling or damage to the slide during installation. Allow easy removal with a liner tool or punch if future servicing is needed. Ensure proper firing pin channel alignment and clearance. M*CARBO designed this component to fit correctly once the slide is assembled, ensuring proper striker operation — even if it feels loose when the slide is disassembled. ? Fitment Expectations A slight looseness before full assembly is normal. Once the striker and backplate are installed, the liner is fully supported and does not move or rattle. The channel liner still properly guides and supports the striker, just like the OEM part.