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Site News GunTube Under Attack: The Smith & Wesson Lawsuit Expands
5/2/2026 1:15:31 PM EDT
I have a 10.3 barrel. How much of the gas block would an 8 inch BCM rail cover?
5/2/2026 2:00:55 PM EDT
[#1]
This thread will show you what you need to know.
https://www.ar15.com/forums/ar-15/What-Rail-Length-Do-I-Need-A-Guide/12-751983/
5/2/2026 2:39:02 PM EDT
[#2]
Thx. It would be nice if I could see a picture of the combo I’m considering though instead of just an image with measurements.
5/6/2026 10:19:53 AM EDT
[#3]
Quote History
Originally Posted By Josh-L:
Thx. It would be nice if I could see a picture of the combo I'm considering though instead of just an image with measurements.
View Quote
Based on the linked thread, you have a bit of gas block passed the end of the rail. BCM says the 8" is 8.14" to the end of the flare. However, I went ahead and built it in gunstruction...

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