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AR15.COM
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6/7/2026 7:07:12 PM EDT
Have always been curious about what different and/or proprietary gas systems there really are. Obviously there's the "intermediate" (longer than mid, but shorter than rifle) kind, but are the carbines a typical carbine gas length? What about rifle or LPR variants?

Also, on gas ports has anyone actually taken something like a pin gauge to measure?

I guess what I'm getting at is I have a mix master SR15 I acquired and want to build an LPR at home. Really would like to source a barrel that mimics the proprietary gas system if possible.


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