Surefire Smedium frame…6arc and “others”

dms416 · Jan 17, 2025

Magpul Releases PMAG for SureFire ICAR 6 ARC | Soldier Systems Daily

I've been sitting in this for a long time. Magpul is poised to begin selling a new 25 round version of the PMAG. Designed in conjunction with SureFire ...

soldiersystems.net

Ok…now 6arc has my attention.

hlee · Jan 17, 2025

Wake me when it is out of pre-production and available outside of the one un-named customer.

buyobuyo · Jan 17, 2025

It's also not standard AR size. It's for the enlarged LWRC Six8 guns.

dms416 · Jan 17, 2025

hlee said:
Wake me when it is out of pre-production and available outside of the one un-named customer.

SHOT 2025: Year of the Shmedium frame gasser.
Q3 of 2026: < 10% come to market

Tx_Aggie · Jan 17, 2025

buyobuyo said:
It's also not standard AR size. It's for the enlarged LWRC Six8 guns.

I might be wrong, but I was under the impression that the Six8 lowers will work with standard AR15 uppers.

buyobuyo · Jan 17, 2025

Tx_Aggie said:
I might be wrong, but I was under the impression that the Six8 lowers will work with standard AR15 uppers.

You can probably run a standard mag in the Six8. I've never seen one. However, a mag for the Six8 is larger and won't fit in a standard AR15, so these new mags won't fit in any existing guns unless they have Six8 magwell dimensions.

LRRPF52 · Jan 17, 2025

Tx_Aggie said:
I might be wrong, but I was under the impression that the Six8 lowers will work with standard AR15 uppers.

You need a different upper with wider walls around the feed ramps, since the Six8 PMAGs are significantly wider.

The LWRC and New Frontier Armory uppers and lowers are different than standard AR-15 receiver sets for this reason.

LWRC and NFA do allow standard barrels and BCGs to be used in them.

rpoL98 · Jan 17, 2025

so is this the beginning of a new AR standard? the AR-12.5? halfway between AR-10 and AR-15?
or is it the AR-6.8? AR-68 since we don't do decimals?

the anti-gun people will go ape-sh!t, because AR-68 is 53 AR's more than AR-15.

time will tell.

hlee · Jan 17, 2025

rpoL98 said:
so is this the beginning of a new AR standard? the AR-12.5? halfway between AR-10 and AR-15?
or is it the AR-6.8? AR-68 since we don't do decimals?

the anti-gun people will go ape-sh!t, because AR-68 is 53 AR's more than AR-15.

time will tell.

AR270, because fuck the metric system.

st1650 · Jan 17, 2025

…. Or just get Geissele 6ARC mag

Cascade Hemi · Jan 18, 2025

Apparently PSA is releasing a gun around the ICAR mag.

Greg0326 · Jan 18, 2025

st1650 said:
…. Or just get Geissele 6ARC mag

For a mere $128 per magazine

buyobuyo · Jan 18, 2025

Greg0326 said:
For a mere $128 per magazine

If you wait for them to go on sale, they'll use a little lube when they violate you for only about $100 per mag.

hlee · Jan 18, 2025

buyobuyo said:
If you wait for them to go on sale, they'll use a little lube when they violate you for only about $100 per mag.

Buy 5 ASC mags, throw away 4 that don’t run reliably. Come out money ahead…

Cascade Hemi · Jan 18, 2025

hlee said:
Buy 5 ASC mags, throw away 4 that don’t run reliably. Come out money ahead…

Buy five Magpul ICAR mags and an entire receiver set, come out money ahead.

hlee · Jan 18, 2025

Cascade Hemi said:
Buy five Magpul ICAR mags and an entire receiver set, come out money ahead.

Idk. Surefire and sole-source says “fuck you money” to me.

steve123 · Jan 18, 2025

But how far out can a bullet be loaded to be just short of internal dimension length vs around 2.240 in a regular mag?

Cascade Hemi · Jan 18, 2025

hlee said:
Idk. Surefire and sole-source says “fuck you money” to me.

It isn't sole-source. New Frontier has receivers. With SF and PSA entering the fray you'll probably see more this year.

C-6.8 Billet Lower

Experience high-quality performance with the C-6.8 Billet Lower receiver. Made from 7075 T6 billet aluminum, this multi-caliber lower is compatible with LWRC SIX8 magazines. Build your dream rifle today!

www.newfrontierarmory.com

C-6.8 Slick Side Billet Upper

Introducing the C-6.8 Slick Side Billet Upper Receiver by New Frontier Armory. Compatible with LWRC SIX8 magazines and AR-15 components. Build your dream rifle today!

www.newfrontierarmory.com

I think you're going to see a bunch of incremental improvements to bolts too. Listen the GA podcast about their new BCG. They changed lug radii and improved lug strength significantly. I believe the Monster bolts did something similar too.

LRRPF52 · Jan 18, 2025

steve123 said:
But how far out can a bullet be loaded to be just short of internal dimension length vs around 2.240 in a regular mag?

I measured my Six8 PMAGs internal raw length with the follower removed.

2.325” raw, so you could load to 2.300” with tolerance variance and be good to go I think.

I was going to hog them out for Grendel, but I’ll just get the new ones now.

I already have the NFA Receiver set.

Geissele ARC mags have really long raw internal length about the same as that. They fit in regular AR-15 receivers.

MaximusDecimusMeidius · Jan 18, 2025

what's the longest coal that geissele 6 arc mags can be loaded to?

TonyTheTiger · Jan 18, 2025

Just as a data point, I've been loading several calibers to 2.31" in unmodified ASC mags and standard receivers for years.

LRRPF52 · Jan 18, 2025

MaximusDecimusMeidius said:
what's the longest coal that geissele 6 arc mags can be loaded to?

The raw internal length I measured on a sample of 1 Geissele 6 ARC mag was 2.327”, so you could load to 2.310” and should be fine, not experience bind-up.

I’ve experienced bind-up from the meplats before with .260 Rem loaded a little long in Gen I 7.62 PMAGs. I was loading up mags before a stage and the cartridge stack jammed-up, but I could still load 15 and it ran fine, so you have to test the whole cartridge stack, not just one round.

For 6.5 Grendel, my CProducts and ASC mags allow loading to around 2.300”. I don’t have feeding problems either.

MaximusDecimusMeidius · Jan 18, 2025

what's the longest coal an ICAR mag can be loaded to?

WindstormSCR · Jan 19, 2025

PSA just revealed they're doing larger barrel extensions and larger bolts, wonder if the same is true for the ICAR?

Definitely has the makings of a new semi-standard

MaximusDecimusMeidius · Jan 19, 2025

does the icar mag let you load rounds any longer than a geissele 6 arc mag?

Cascade Hemi · Jan 19, 2025

The future is now...

Surefire Smedium frame…6arc and “others”

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