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12/26/2025 9:44:15 PM EDT
I’m almost certain the gas block will clear the rail, but I’m a little nervous since there is no way to be sure without cutting off the delta ring and handguard cap first.  Has anyone tried this exact combination?
12/27/2025 12:31:15 AM EDT
[#1]
THIS IS NOT MY RIFLE!

This looks like the exact setup you’re wondering about, and it appears to work just fine. I wish I remembered whose rifle this was so I could tag them.

Your painted rifle is ugly, but I’m uglier, so send it to me and I’ll make it look good!

If it weren’t for double standards, we’d have no standards at all.
12/27/2025 12:35:07 AM EDT
[#2]
Fantastic - thank you!  I was pretty sure before I ordered the rail, but then I started doubting myself.
12/27/2025 1:01:04 PM EDT
[#3]
Is the gas block dofferent than any other block?

It should be fine.
12/27/2025 2:15:00 PM EDT
[#4]
Standard BCM shaved, I was a little gunshy after finding how tight the CMR rails are.
12/28/2025 7:22:25 PM EDT
[#5]
The C4s have a lot of clearance inside and should fit all but the girthiest of gas blocks. I used a Troy for quite a while before eventually getting a Centurion gas block just for the tab to match the alignment notch in Centurion barrels.
12/28/2025 8:08:55 PM EDT
[#6]
Quote History
Originally Posted By DarkWolfRob:
The C4s have a lot of clearance inside and should fit all but the girthiest of gas blocks. I used a Troy for quite a while before eventually getting a Centurion gas block just for the tab to match the alignment notch in Centurion barrels.
View Quote

Thanks for the info!
5/12/2026 4:58:37 PM EDT
[#7]
I just realized I never showed the result:
Attached File

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