Originally Posted By Video:
My mod2 trigger seems to be better than the V2 lower trigger. The hammer looks different, they made some changes.

The V2 or KS series is as far as they are going to go. This is the end game and more KS rifles will be around within a few years. If they make the quality control as good as Geissele they would take over as the ultimate.

I imagine the civilian rifles don’t get the same TDP as contract rifles. FN and Colt aren’t allowed to sell Techical data package equipment to civilians. The barrels have been considered really good up to recently ironically.

Originally Posted By Video: FN and Colt aren’t allowed to sell Techical data package equipment to civilians. The barrels have been considered really good up to recently ironically.

Originally Posted By BigBoss01:
KAC Experts, need some advice…

I’ve picked up all three recently.

All were “used”.

Two, Mod2 16” and just swapped for the KS-4 last night.

I really only want to keep two.

Both Mod2’s have regular E3 bolts but one has a notched upper receiver and is LNIB. Non notched has some rounds through it but it’s negligible.

KS-4 is LNIB and has a SSA-X.

SSA-X can get moved around.

Is one Mod2 going to be more desirable down the road?

The full ambi lower of the KS-4 is cool but not enough to sway me.

Is the URX6 truly better than the URX4 besides being “easier” to work on?

Will the MOD2 become the next “collector piece”.?

I’m also seeing conflicting reports on ARMAD barrels in the KS-4.

KAC website makes it seem like no ARMAD for the KS-4.

One will get a NX8 1-8 and the other will get a something cool too lol.

I appreciate y’all’s opinions.

Thanks.

Originally Posted By icura:

anything KAC + dimples tends to do well over time.

Originally Posted By icura:
You don't have to guess, KAC does not list the KS-4 as having 32CrMoV12-10 steel, aka ARMAD (which it does for KS-1, 2 & 3).

Originally Posted By Jack_L:


Original (Mod 1 and previous) 5.56 barrels were not 32CrMoV12-10, but rather a very similarly performing but different hammer forged material, 21CrMov5-11. The original 20,000 round barrel life was with this material.

Our 11.5" and 14.5" Mod 2 guns were changed to 32CrMov12-10 shortly after the change to MLok, mostly to ensure that contract 11.5" full-auto guns would make a full 20k life even with a decent amount of full-auto fire. Back then nobody cared about barrel material, focus was on performance. We never really "hid" the barrel material, it just wasn't important to the market at large so there wasn't much advantage in putting it out in the world. When the market became interested in barrel material, we added it as a public-facing technical detail.

To be very open, we do not use Armad (that's a specific name for a specific A&D recipe), but our own 32CrMoV12-10 blend from a different source. Testing has shown that our recipe gives us what we need. That's not to say that we will never use Armad, or some other barrel material, but that use will be predicated on a performance requirement necessity, not just throwing a catch-phrase market term at a product.

The hammer forging and chroming process for these barrels has been the same for nearly 10 years.

Specifically focusing on 16" 5.56 barrels, they have been made from a few different materials over the years that meet our performance requirements. They will likely solely be 32CrMoV12-10 in the near future, but as there are many that were not, we did not want to claim them to be something that they aren't, and thus we simply list them as a Cold Hammer Forged Chrome-Moly Vanadium barrel. Ultimately, barrel life and performance between the materials is virtually identical in this application. Consolidating everything to the same material is to simplify logistics and manufacturing processes more so than a performance change.

Originally Posted By Jack_L:


Original (Mod 1 and previous) 5.56 barrels were not 32CrMoV12-10, but rather a very similarly performing but different hammer forged material, 21CrMov5-11. The original 20,000 round barrel life was with this material.

Our 11.5" and 14.5" Mod 2 guns were changed to 32CrMov12-10 shortly after the change to MLok, mostly to ensure that contract 11.5" full-auto guns would make a full 20k life even with a decent amount of full-auto fire. Back then nobody cared about barrel material, focus was on performance. We never really "hid" the barrel material, it just wasn't important to the market at large so there wasn't much advantage in putting it out in the world. When the market became interested in barrel material, we added it as a public-facing technical detail.

To be very open, we do not use Armad (that's a specific name for a specific A&D recipe), but our own 32CrMoV12-10 blend from a different source. Testing has shown that our recipe gives us what we need. That's not to say that we will never use Armad, or some other barrel material, but that use will be predicated on a performance requirement necessity, not just throwing a catch-phrase market term at a product.

The hammer forging and chroming process for these barrels has been the same for nearly 10 years.

Specifically focusing on 16" 5.56 barrels, they have been made from a few different materials over the years that meet our performance requirements. They will likely solely be 32CrMoV12-10 in the near future, but as there are many that were not, we did not want to claim them to be something that they aren't, and thus we simply list them as a Cold Hammer Forged Chrome-Moly Vanadium barrel. Ultimately, barrel life and performance between the materials is virtually identical in this application. Consolidating everything to the same material is to simplify logistics and manufacturing processes more so than a performance change.