Quote:
Originally Posted by The Reaper
You would need another upper for 5.56, with the bolt carrier and charging handle. At that point, you are within a couple of pounds of humping two complete carbines.
A .22LR conversion unit uses the .223/5.56 barrel for the bullet to engage the rifling. The 7.62 upper would not work for that system.
I suppose a case could be made for a .308 carbine, and a dedicated .22LR upper, but again, the upper with conversion unit and CH probably weighs a lot more than a .22LR pistol and probably almost as much as a 10/22 Ruger.
Your call, looks gimmicky to me.
TR
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Not to mention that if you are shooting .22 through a .223 barrel, it will be inaccurate as hell. The bullet does not properly engage the rifling and the twist rate is too slow. Just stick with the 5.56/.223 and you can do whatever you would need.