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Is this a shouldered pre fit? Or does it require the nut and go no go gauges ? — 3 Answers

by Dogsniper, from WY, United States Asked on October 29, 2019

Name Proof Research Big Horn Pre-Fit Carbon Fiber Barrel
$1,149.00 $999.00 Save 13%
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A
Answered by Jonathan D., Gear Expert, from IL, United States, on December 11, 2019

These are shouldered. They will require a nut and it is advised to check headspacing with go and no-go gauges.

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A
Answered by ABC1000, guest, from ID, United States, on December 15, 2021

If they’re shouldered why do you need a barrel but? I run my Carbon proof barrels without a nut???

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A
Answered by Brandon, member, from UT, United States, on March 10, 2021

These are pre-fit Zermatt Arms shouldered barrels for the TL3/SR3. The barrels are specific to the action type/length and are not interchangeable, but Proof makes installation easy on these by just threading it on, torque it down, double check headspace and you should be good to go.

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Last updated 2025-11-12 UTC.