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What is the gas block profile on this barrel? .750 or .875? — 3 Answers

by Billy Buttsack, from MH, United States Asked on January 12, 2023

Name Hitman Industries AR-15 .450 Bushmaster Government Rifle Barrel
$162.50 $130.00 Save 20%
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A
Answered by Ethan, Gear Expert, from IL, United States, on February 28, 2024

The Hitman Industries AR-15 .450 Bushmaster Government Rifle Barrel features a 0.875" gas journal.

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A
Answered by Richie, member, from VA, United States, on August 26, 2023

.875 is the gas block profile. Make sure to get low profile if you plan on using the newer smaller diameter free float hand guards. It’s a close fit with this monster!!

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A
Answered by Ian, member, from OH, United States, on June 29, 2023

.875 I had to use micrometer on the barrel as my other .450 gas block would not fit

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Last updated 2025-11-12 UTC.