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Posted: 1/6/2012 5:47:03 AM EST
I'm contemplating building a dedicated .22 upper around a CMMG conversion kit I bought a couple years ago. This may seem like a stupid question, but do dedicated .22 uppers have gas tubes? My gut reaction says no. but i'm not sure.
Link Posted: 1/6/2012 6:07:05 AM EST
Nope.
Link Posted: 1/6/2012 7:29:35 AM EST
No, they operate on the same principals as a typical rimfire semi-auto. The bolt does not lock and the inertia is used in blow-back fashion.
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