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· RIP - In Memoriam
11,377 Posts
Are we talking the 5.7 X 28 uppers for AR's that utilize the P-90 magazines?

An expensive addition in an inferior caliber that is difficult to find and even more difficult to reload fed by expensive, albeit cool magazines.. I'll pass.

If I happened to have a few cases of ammo and a dozen magazines given to me, I might reconsider.
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