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Q&A for Rosco OPMOD Bloodline 5.56mm Nato 13.9in Threaded Barrel — 3 Questions & 5 Answers

Name Rosco OPMOD Bloodline 5.56mm Nato 13.9in Threaded Barrel (4.9)
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Q
Paul Pepin, member, from IL, United States, asked on December 07, 2022

Is this barrel chromelined

Manufacturer Answer
A
Answered by OPMOD, Manufacturer from IL, United States, on January 03, 2023

All Bloodline barrels are 4150 Chromemoly Vanadium Steel and made here in the US.

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Q
King, member, from CA, United States, asked on June 22, 2022

On Roscos website it says their 13.9 is carbine length gas system. Are these actually mid length or are they carbine length? Are these barrels dimpled

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on July 11, 2022

The Rosco OPMOD Bloodline 5.56mm Nato 13.9in Threaded Barrel features a mid-length gas system 0.750" diameter. They are not dimpled from the factory.

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Q
Jason Edwards, member, from SC, United States, asked on January 13, 2023

Does anyone k ow the 13.9 bloodline gas port diameter? Not the barrel diameter. The actual gas port size(I.e. .071-.076)

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on April 12, 2023

Rosco does not provide the gas port diameter for their Bloodline 5.56mm Nato 13.9in Threaded Barrel. They only state that it features a 0.750" gas journal diameter. I would recommend contacting Rosco directly for more information.

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