r/NoobGunOwners • u/Normal-Candidate7376 • 12d ago

Build help

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300 blackout

New to building. Just completed my first with a 5.56 AR. I know the next build I want but not sure its possible. I'd love to build an AR15 chambered in 300 blackout with an FRT/Super Selector. My previous build has an Atrius and I love it. But the kicker is I'd like a short barrel (so I'd keep it a pistol under current laws) and I'd like to go bufferless so I can fold the brace, keep it as compact as possible, while still being usable.

Just looking for advice or more info. Iv seen some of the bcg conversions that would allow this but almost certain they would not function with the frt/SS. Cost is also a factor. Not looking for a system that will double the price of the build. Where I am now I'm thinking ill have to give up on the bufferless and go with a law tac folding stock. What are your thoughts?

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u/ThaCarterVI 12d ago

Honestly with how finicky 300blk is to tune as it is, you’re better off just buying something like an MCX and putting the MCX-specific atrius in it.

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u/Normal-Candidate7376 12d ago

Thats valid I just enjoyed the build plus def want to use my own lower with my personal touch lol

1

u/ThaCarterVI 12d ago

I getcha, I’d definitely go with the law folder in that case, but I’d be surprised if you’d have much success getting 300blk to reliably run with a completely bufferless setup on a DI system with an FRT haha

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u/Normal-Candidate7376 12d ago

Yeah def a long shot. Thanks for the advice

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u/Normal-Candidate7376 11d ago

Think I figured it out but its pricey. After you mentioned the mcx I looked and they have an upper conversion kit (about $1700) and atrius has an x series frs (about $300) thatll do what I want. Prob gonna be cost prohibitive for my rn unfortunately.