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What are the barrel specs? Chrome-lined, twist, profile? A lot of these PWS Barrels don’t come with any info. Thanks. — 1 Answer

by MP, from PA, United States Asked on January 3, 2022

Name Primary Weapons Systems MK116 PRO 16 inch Upper Receiver (4.5)
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Answered by Ethan, Gear Expert, from IL, United States, on March 01, 2022

Primary Weapons Systems only provided that it is a 1:8 twist barrel. I would recommend reaching out directly to the manufacturer for more information on the MK116 Pro 16in bbl Upper Receiver.

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Last updated 2025-11-12 UTC.