Ultralight Ultralight Rifles

[packgoatguy]

anyone else found a lightweight 6ARC barrel option yet or have an accurate weight on the BCA 16 inch M4 profile 6ARC barrel?

 

[Trackselk]

If anyone is looking for a new shaw Portless I've got one for sale

 

[Trackselk]

Xcaliber has a 20% off sale going on for a short time, and they have the 223ai chambering if anyone is looking for one. It'll be a lot heavier than a shaw or bca, but lri can turn it down for $125.

Xcaliber 16" stainless 223ai just set me back about $333 shipped. Only bad thing is 11-18 weeks wait estimate

*portless is an option!

*I'll be sending LRI a bca barrel (16oz type) to copy the profile, saves $50. Let me know if you want me to mail it to them early for your project.

 

[packgoatguy]

If anyone is looking for a new shaw Portless I've got one for sale

I'll take it.

 

[glock233]

anyone else found a lightweight 6ARC barrel option yet or have an accurate weight on the BCA 16 inch M4 profile 6ARC barrel?

XCaliber barrels.

 

[packgoatguy]

Xcaliber has a 20% off sale going on for a short time, and they have the 223ai chambering if anyone is looking for one. It'll be a lot heavier than a shaw or bca, but lri can turn it down for $125.

Xcaliber 16" stainless 223ai just set me back about $333 shipped. Only bad thing is 11-18 weeks wait estimate

*portless is an option!

*I'll be sending LRI a bca barrel (16oz type) to copy the profile, saves $50. Let me know if you want me to mail it to them early for your project.

Do they have a 6x45 option?

 

[glock233]

Do they have a 6x45 option?

Yup. Should be available portless pencil barrel too.

 

[packgoatguy]

Yup. Should be available portless pencil barrel too.

Any idea on where they end up weight-wise with their pencil profile? If I remember seeing a pic once, it was a little thicker than a faxon.

 

[glock233]

Any idea on where they end up weight-wise with their pencil profile? If I remember seeing a pic once, it was a little thicker than a faxon.

Unfortunately no. I think you'd have to call.

 

[Taudisio]

Any idea on where they end up weight-wise with their pencil profile? If I remember seeing a pic once, it was a little thicker than a faxon.

Spaghetti contour, 16”, 6x45 xcaliber barrel

 

[Trackselk]

I'd definitely jump on their sale. Saved me about $75!

 

[packgoatguy]

Spaghetti contour, 16”, 6x45 xcaliber barrel

Nice! How's it shoot? Have you run any 95tmk in it?

 

[Taudisio]

I have posted about it a lot, probably been since 2024. I haven’t grouped the 95’s, but got them up to 2600+fps with the pressure tests I did with the 20 I was given. That is my project for this summer since the 95’s came in stock and I bought 1500.

 

[glock233]

What’s the state of the art in 2026 for lightest / good 5.56 AR magazine ? Probably looking at 5 and 10 rounders.

 

[robtattoo]

What’s the state of the art in 2026 for lightest / good 5.56 AR magazine ? Probably looking at 5 and 10 rounders.

Duramag stainless, I believe, are about the lightest reliable.

5 round mags are just 10 rounders with longer legs on the follower. The 10 rounders are a hair lighter.

You might shave a gram with aluminum, but the benefits of stainless vastly outweigh the literally not noticeable weight saving.

 

[MEdude]

This BA is fairly light. Out of stock and I have no experience with it though.

12.5” 6MM ARC DMR Fluted Carbine-Length 1/7 416R SS, Premium Series

High quality means high performance. Our 12.5" inch 6MM Arc barrel exemplifies this idea and is sure to give you the best results for your AR 15 build.

www.ballisticadvantage.com

I have this 12.5 fluted barrel from BA. I weighed it with a digital fishing scale at 21 oz.
The scale reads only whole numbers, not tenths. So that is likely rounded up or down a fraction of an oz.
Just started the build. I don’t know anything about accuracy.

 

[checkrog]

I’ve got a brand new Solo 300 build that I’m abandoning and parting out if any of you are interested

 

[Thegman]

What’s the state of the art in 2026 for lightest / good 5.56 AR magazine ? Probably looking at 5 and 10 rounders.

As @robtattoo said, there's no benefit with a 5 rounder.

The Duramags offer the most OAL if you handload. Their 350 Legend magazines seem to offer the most OAL, mine allow 2.325" and feed everything from 223 to 350 legend fine in a Solo.

If shooting only factory length I've found the various Magpul pmags to work just fine.

They can even be windowed for at least a few rounds to allow about 2.325". They're thicker material in the back so can't get to 2.365"-ish like a windowed stainless mag allows.

 

[packgoatguy]

What’s the state of the art in 2026 for lightest / good 5.56 AR magazine ? Probably looking at 5 and 10 rounders.

I've liked the Lancer l5 mags.

https://gunmagwarehouse.com/lancer-l5-gen-2-ar-15-223-5-56-10-round-advanced-warfighter-magazine.html

 

[Taudisio]

Lancers are my favorite by far unless I need some extra cartridge length for handloads, then it’s stainless steel duramags.