Shortest 300 blk barrel

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

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dellet
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Re: Shortest 300 blk barrel

Post by dellet »

PNW17 wrote: Wed May 01, 2019 7:18 pm Got the short adapter for the can that cuts the length down a bit more. The alternate piston gas block is on the mill now being bored out.

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What is total length and length of suppressor?
300 Blackout, not just for sub-sonics.
PNW17
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Re: Shortest 300 blk barrel

Post by PNW17 »

dellet wrote: Thu May 02, 2019 11:21 am
PNW17 wrote: Wed May 01, 2019 7:18 pm Got the short adapter for the can that cuts the length down a bit more. The alternate piston gas block is on the mill now being bored out.

Image
What is total length and length of suppressor?
4.4” bbl + 8” can = 12.4”
PNW17
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Re: Shortest 300 blk barrel

Post by PNW17 »

Using a boring head to cut barrel pass through on micro piston block.

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dellet
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Re: Shortest 300 blk barrel

Post by dellet »

PNW17 wrote: Thu May 02, 2019 4:06 pm
dellet wrote: Thu May 02, 2019 11:21 am
PNW17 wrote: Wed May 01, 2019 7:18 pm Got the short adapter for the can that cuts the length down a bit more. The alternate piston gas block is on the mill now being bored out.

What is total length and length of suppressor?
4.4” bbl + 8” can = 12.4”
I was wondering about overall length of the whole pistol. Probably should have included collapsed and extended for to make better sense.
300 Blackout, not just for sub-sonics.
PNW17
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Re: Shortest 300 blk barrel

Post by PNW17 »

dellet wrote: Thu May 02, 2019 11:49 pm
PNW17 wrote: Thu May 02, 2019 4:06 pm
dellet wrote: Thu May 02, 2019 11:21 am
What is total length and length of suppressor?
4.4” bbl + 8” can = 12.4”
I was wondering about overall length of the whole pistol. Probably should have included collapsed and extended for to make better sense.
29.25” extended, 26.5 collapsed”
PNW17
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Re: Shortest 300 blk barrel

Post by PNW17 »

In an effort to try to cut out recoil I took the jp silent captured spring, cut the spring down by about 4”, removed the buffer and cut a new one out of acetal. Also got a lightened bolt. I will start with no gas and work my up to get it to cycle. We’ll see if it works....

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PNW17
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Re: Shortest 300 blk barrel

Post by PNW17 »

Here is a pic of the blank on the upper for the mini piston project.
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PNW17
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Re: Shortest 300 blk barrel

Post by PNW17 »

PNW17 wrote: Sat May 04, 2019 4:54 pm In an effort to try to cut out recoil I took the jp silent captured spring, cut the spring down by about 4”, removed the buffer and cut a new one out of acetal. Also got a lightened bolt. I will start with no gas and work my up to get it to cycle. We’ll see if it works....

Image

Image
The bolt was riding over the rounds and I was having failures to load. Need to try again with the old bolt
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GunFunZS
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Re: Shortest 300 blk barrel

Post by GunFunZS »

Really cool project.

I wasn't much interested in the micro barrel thing, but this is neat. Especially on that SBR stock.

There are now a couple lowers with integrated folding mechanisms. One of those with a pistol brace on it would be really slick with a kit like this for backpacking/ car use too.
PNW17
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Re: Shortest 300 blk barrel

Post by PNW17 »

I tried 180 gr Speer jacketed soft points thinking that I could reduce the copper chunks coming through the gas port into the bolt vs. the plated bullets. Fouling in the bolt is less but I ended up with chunks of the jacket in the suppressor. Do I just have crappy bullets or is the short barrel/gas port causing the jacket to separate?
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