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Kac cqb mod2 upper
Kac stripped non ambi lower
Colt lpk
Colt a1 grip
Kac trigger guard
Bauer buffer tube
Colt n1 car stock
Kac butt stock sling mount
Geissele ssae trigger
Gas buster charging handle
DD m4a1 handguard cut down
Kac m4qd muzzle device
Kac nt4 suppressor
Kac short scope ring riser
Kac Aimpoint mount
Kac battery cap cover
Aimpoint t2
Kac taupe front sight
Kac taupe handguard covers
Kac taupe vfg
Kac rear sight
Modlite arisaka mount

What’s up guys, this is my sr25 APC. First sr25 and I love it. Thinking about cerakote? Should I do it all Knights taupe? Also any cool shit I should buy for the setup yall know about, let me know! Thanks fellas

It was March 2014 and I had just gotten my first full bonus working at at Nabors. Oil was averaging around $100/bbl and there was prime rib at the Christmas party that year. SO why not splurge? It's not like there would be a falling out of the market three months later! So, I went and procured this beauty and to this day still has around the same 50 rounds I put on it the weekend I bought it before going back in the safe. Robbed the old optic for a Mk12 project sometime in 2016 so it's been sitting for a while.

Dusted her off and threw on a Mk5 I had laying around with no host. May do a range report tomorrow with some Gold Medal match. It's survived three layoffs, four girlfriends, covid, and a total house cleaning of my collection to raise money for a family members surgery. It's the least I can do on a warm summer day in 2026.

After years of dreaming and hoping I’d own an SR-15, the day finally came. Store said they got 5 in, 3 KS2s and 2 KS4s and this was the last of the batch. I was debating this or the SOLGW MK1, and I think I made the right choice ^w^

Had an airsoft version of the urx3.1 and now 10 years later I have the real steel. Feels good

Pretty recently graduated from my BCMs and Geissele to branching out and trying other high quality ARs. I purchased a ks3 and I’m getting just under 2 moa groups with mk262. I’ve tired out several different high quality rounds and the results have been closer to 3moa or worse. I also put a ks1 and ks6 on order before playing around with my ks3.

My super duty shoots sub moa consistently with mk262. Is this accuracy normal for KAC? Somewhat wondering if I should cancel/hold off on the ks6/ks1 and look at other platforms. (I realize accuracy isn’t everything, but I like being sub moa or close to it.)

Took the KS-1 out today for round 2 of accuracy testing. If you haven't already, check out my last post here - KS-1 Accuracy Testing : r/kac

So, what's been done since last time?

I purchased a Knight Stick to pull off the muzzle device and re-torque. Here I found what was possibly contributing to my poor accuracy from test #1. The muzzle device took OVER 100 FT-LBS to break free. Yes, I know KAC uses Rocksett. It was still over-torqued. I clicked my Proto torque wrench (calibrated December 2025) on max torque (100). I then transitioned to a big ass breaker bar and torch as to not damage the torque wrench. I'd say the muzzle device broke free around 101-149 FT-LBS + heat. This is a big issue. Over torqued muzzle devices can cause muzzle constriction and can lead to poor accuracy. The KAC torque spec for muzzle devices is 20 FT-LBS. This video demonstrates what I'm talking about - the Hazard of over torquing your Flash Hiders - YouTube

I then removed the muzzle device, cleaned the threads on both the barrel and 3-prong. Then I re-installed the muzzle device with the same shim stack from the factory. When properly torqued to 20FT-LBS, the muzzle device was still about 25 degrees from TDC. For testing purposes, I then torqued to TDC to get an idea of where KAC had it from the factory. It took 45 FT-LBS to align to TDC. Remember, this is post thread stretch from being over-torqued. So, I'm guessing it was torqued way more at the factory.

Finally, I re-installed the muzzle device with Rocksett, completely re-shimmed and torqued to exactly 20FT-LBS. Concentricity checked with alignment rod. Somebody at KAC needs to go back to training on timing a muzzle device and using a torque wrench.

One comment I received a lot of last post was, "How to we know this guy can even shoot? It's just some random guy on the internet". This is a valid concern. This time I included a control group with a known good, shooting sub-MOA AR. I shot a .67 MOA 10 round group to showcase my abilities. This was done with a Noveske 18" stainless SPR barrel shooting Black Hills MK262. Same Vortex Razor 1-6 optic. Geiselle SSA-E trigger. Harris bipod and rear bag. KAC CRS PRT can.

Details of the KS-1 are the same as last test other than the muzzle device being re-torqued. No malfunctions this trip. Weather 89 degrees, sunny, 6mph wind gusting 10mph, 62% humidity. Nice day out. Shooting done benchrest with Harris bipod and rear bag. Stock KAC 2-stage trigger and MCQ-1 suppressor. Target 1 I used a homemade barrel cooler in-between groups. Target 2 was shot straight through no cooling due to time constraints.

Here are my results

(10-shot groups/strings unless otherwise noted)

Control Group with 18" Noveske SPR

Black Hills MK262 77gr
50 yd Group: 0.350"
50 yd MOA: 0.67
No Velocity Data

KS-1 Chronograph & Accuracy Data

Barnes 70gr TSX
50 yd Group: 1.023"
50 yd MOA: 1.95
Average Velocity: 2622.4 FPS
Extreme Spread: 32.1 FPS
Standard Deviation: 12.0 FPS

Black Hills 69gr OTM
50 yd Group: 1.054"
50 yd MOA: 2.01
Average Velocity: 2613.3 FPS
Extreme Spread: 111 FPS
Standard Deviation: 31.6 FPS

Hornady 73gr ELD Match
50 yd Group: 1.307"
50 yd MOA: 2.50
Average Velocity: 2397.3 FPS
Extreme Spread: 60.5 FPS
Standard Deviation: 20.4 FPS

PPU 69gr HPBT Match
50 yd Group: 1.201"
50 yd MOA: 2.29
Average Velocity: 2389.5 FPS
Extreme Spread: 40 FPS
Standard Deviation: 11.4 FPS

Lake City M855
50 yd Group: 1.855"
50 yd MOA: 3.54
Average Velocity: 2815.1 FPS
Extreme Spread: 95.3 FPS
Standard Deviation: 26.2 FPS

PMC X-TAC 62gr M855
50 yd Group: 1.730"
50 yd MOA: 3.30
Average Velocity: 2760.8 FPS
Extreme Spread: 112.3 FPS
Standard Deviation: 27.6 FPS

Black Hills MK262 77gr
50 yd Group: 0.883"
50 yd MOA: 1.69
Average Velocity: 2498.5 FPS
Extreme Spread: 49.7 FPS
Standard Deviation: 15.2 FPS

Magtech 62gr FMJ
50 yd Group: 1.847"
50 yd MOA: 3.53
Average Velocity: 2790.4 FPS
Extreme Spread: 123.6 FPS
Standard Deviation: 41.4 FPS

Barnes 70gr TSX (Second Test)
50 yd Group: 1.456"
50 yd MOA: 2.78
Average Velocity: 2635.3 FPS
Extreme Spread: 19.3 FPS
Standard Deviation: 7.6 FPS

Black Hills 69gr OTM (Second Test)
50 yd Group: 1.015"
50 yd MOA: 1.94
Average Velocity: 2644.5 FPS
Extreme Spread: 48.8 FPS
Standard Deviation: 14.7 FPS

PPU 69gr HPBT Match (Second Test)
50 yd Group: 1.573"
50 yd MOA: 3.00
Average Velocity: 2398.8 FPS
Extreme Spread: 44.5 FPS
Standard Deviation: 12.8 FPS

Hornady 73gr ELD Match (Second Test)
50 yd Group: 1.512"
50 yd MOA: 2.89
*Average Velocity: 2398.4 FPS
*Extreme Spread: 60.3 FPS
*Standard Deviation: 17.1 FPS
*9-shot string (one shot not recorded)

Conclusion

Black Hills MK262 group seem much better this time around. Group average went from 3.85 on test 1 to 2.72 on test 2. That’s roughly a 29% reduction in group size. Could this have been from the MD re-torque? It’s still not the greatest but acceptable IMO for the type of shooting this rifle was designed for. Someone had a good quote on the last post I made, "The KS-1 is for the trenches not the benches". One thing I found encouraging was the consistency. While none of the loads produced tiny benchrest groups, none of them completely fell apart either. Across multiple lots and repeat testing, the rifle generally stayed in the ~2–3 MOA range with most ammunition. Again, these posts are for informational purposes.

Got some blackarc Nas3 77gr smk ammo and shot it out of a ks1 since haven’t seen any results. Did a 5 round group test at 100 yards and results seem on par with everyone else. About a 2 inch group

The current state of my KS1. It's been a decent shooter so far. Accuracy for me has been 1.5-3 MOA depending on the ammo. The gassing on this thing is absolutely amazing. And I really dig the MCQ. Yes, its not quiet, but it certainly takes the edge off. And you forget that it's on there. I'll try to get some group size pictures next range trip.

Granted only a few thousand through this girl with a few minor touch-ups to keep her satisfied, but decided to give her a good scrub a dub with some old no. 9 and breakthrough. Anyone still clean anything or am I just full on gay at this point?

Hey fellas thinking about getting a SR25 this my first long Range distance gun getting I’m usually into 11.5 and 12.5 is there anything to be aware of ?

At some point Kac started producing a half ambidextrous lower for mk11 mod 0 rifles. The only ambi feature on these rifles was the magazine release. I’m curious if anyone knows what the serial number range was for these rifles and if they had some sort of prefix. I’ve seen older mk11s with a K prefix. Not sure if that continued onto these.

SR-25 EMC and SR-15 Mod 1. The EMC was the first KAC rifle I ever got and sort of started the whole fascination with them. Back then (2011ish) when I got it, finding a good .308 gas gun wasn't like it is today. There weren't nearly the amount of current options.

It was also a crash course on how hard these things can be to find - it took some serious searching and driving around back then. It is a fantastic shooter. Easily sub MOA with good ammo.

The SR-15 dates to around 2013 - that window in between the QD cups being integral to the lower and then having them in the end plate. Also an excellent shooter.

Initially grabbed the PRG as I had no idea if/when I would be able to snag a legacy one at non crazy price, but a week later managed to get a legacy one, so now I have two. The legacy will stay on this M110 enhanced mainly, and the PRG will go to a franken MK11 I'll be building out.

Just wrapped this one up and figured I would share for your viewing please

Trading a pvs30 and got offered this, just need help from the boys on authenticity and if it’s worth it.