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11/26/2025 12:57:28 AM EDT
I'd been thinking of getting one and it was on sale.  It's Glock mag compatible for 45acp and 10mm.

So anyway, I've been looking for an upper to put on it.  I want something like the CMMG Dissent where the buffer springs and all that are in the receiver so I don't have to deal with a buffer tube.  The problem is CMMG says there's something special with their upper that might make it incompatible with other brands of lowers.  Of course they don't say what is different so I can't just get out the calipers and take some measurements.

My questions are: has anyone here built a .45 or 10mm with the 80 Percent Arms AR45?  Has anyone tried the Dissent upper on that lower?

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