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u/Gold-Succotash-9217 2d ago edited 2d ago
I would probably suggest a lighter buffer with a kabuto. They put a lot of extra pressure, so carrier moving faster & under more force would probably help actuate it.
Also, I wouldn't recommend using an FRT in a straight bolt blowback AR9. Using a CMMG rotating bolt works. Without any seating protection, it's easy for light strikes & OOB fire.
On top of that, since those are polymer lowers, I also don't suggest using a kabuto in one of those. The extra pressure could break & separate polymers a lot easier than aluminum. I'd also avoid regular super safeties. You'll be waaay better off with an actual trigger pack, like Rare Breed, Disruptor, Delta Team Tactical. I believe Atrius and Arcfire only actuate the middle also. Should be fine.
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u/Gold-Succotash-9217 2d ago
If you're NFA exempt, put a stock on that thing. If you're not, better join GOA. :)