Filter

6 ARC Upper Build: 18” PVA Osprey (Rifle +2”) + San Tan Tactical Billet Upper + SOLGW M89 Rail

Just got back from the range but it was a bit of a bust, only fired 10 shots. The barrel shoots great but I'm still dealing with short stroking (FTE, FTF, FTL) even when I switched to a buffer with 3 aluminum weights (using sprinco white spring) and I'd rather not use a reduced power spring.

I emailed @bohem to see what they recommend....I will likely drill out the gas port a bit from .093" to ~ 0.984" (using a 2.5mm bit), since this is 18" rifle +2 the dwell time is pretty short. I have tried pretty much everything else besides increasing the gas port size (set screw gas block, clamp on gas block, swapped BCG, swapped upper receivers, reduced buffer weights, etc.).

Im also going to clean the barrel and take another peak at the gas port alignment via bore scope.
*Edit: gas port alignment confirmed via scope

There is one more thing I can try, the clamp on gas block paired with the new BCG because I think the clamp on was tried with the other BCG but either way it seems to be on the bleeding edge and Id rather have a little wiggle room for colder temps, weak factory ammo, etc..

Re: my handloads, my velocities for the 10 shots were high 2300 low 2400 which is right around max pressure per Hornady load data for N140:

AD_4nXedpBlVi3voKuASolw7ocFT6xl46y8ftyL-5aP_WRwxAv2bDga-gG9Bywz2DXZRG9S7nNQI5oJIIdpnwYBGyCi-CWizSTSp1tYlkmkv1hN8Q3p8UQ_uRETQzDfQCjQjirrVkfc0Sg
We have a shop rifle at 0.093 and a couple customer rifles all with 0.093 running 18" no problem with factory ammo.
What I would suggest is:

1) Go buy a box of factory ammo, try the 108 ELDm if you can get it.
2) Check everything about the assembly and make sure everything that should be tight is tight, gas tube is aligned properly, etc.
3) Lube the gas rings, carrier, etc.

Go shoot the factory ammo and see what you get. Half the problems that we've gotten calls about went away with factory ammo. N140 is not really ideal powder for this case in a short(er) AR IMO, I would look at 2520 or Lever to start, I have used 2000MR very successfully in similar overbore cases with heavy bullets and had excellent speed results.

What I would strongly NOT suggest is to start drilling things.

Typically I reply to emails during the week but I'm programming things from home today and needed a brake from CAM software and stumbled on this. I'm leaving for a family vacation on Wednesday evening which will probably preclude me from getting back to you until the following Wed or Thursday. If I'm slow to reply, that's why. Ben and Danny will be in the shop but this is more my area than theirs. We'll help you get going, just a heads up I might be hard to get ahold of for a week.

.308, 2000MR, and 175/178/185 Nodes and Loads!

Worked up 3 loads of 2000MR to test in an AR10 308 with 18" Proof steel barrel 1/10tw suppressed
175 SMK, New Nexus primed 308 brass loaded at 2.75 OAL Garmin Xero C1 chrono
8/10/25 830AM 95*F just southwest of Phoenix, AZ.
47.1gr AVG 2615/ ES 21.5/ SD 7.9
47.3gr AVG 2633/ ES 17.0/ SD 6.6
47.5gr AVG 2648/ ES 20.7/ SD 7.0
Primers showed slight flattening but no ejector swipes. Groups were all under 1MOA
Then ran 5rds of factory168 Fed GMM which were AVG 2513/ ES 35.8/ SD 12.2

The "I'm having a great day" thread...

My daughter was officially welcomed to LSU’s School of Veterinarian Medicine last night at the school’s blue Coat Ceremony. She starts classes Monday. I’m having a great day! I’m so proud of her I’m just about to bust!
Go Tigers!

View attachment 8744284

View attachment 8744286

View attachment 8744287
Congratulations! LSU Vet Hospital saved our dog, from cancer! Great place, great people!!F18FBC8E-0CA6-4019-8C06-615D2F876B7F.jpeg

Scope identitification needed.. info please

SN-9 US Optics. The Hubble of scopes. Each one hand built and custom ordered. Most were 40X but there were some 30x done as well. Not sure why JBW2 made them, but I think he wanted to really exercise his creativity!!! Looks like that one might have a Horus (Christmas Tree) reticle in it. Which is crazy! So someone must have ordered it by checking off every box on the USO order sheet just to say they have every thing in one scope! That is wild!!!

If you want to sell it, I will definitely buy!!!

They are pretty unique. External adjustments. Can drive a Jeep over one. But also not great field scopes. Putting one on a Barrett M82 is kind of silly! That said, I have mine on my MRAD... but it's a range gun. My Barrett runs a USO 10x.

Worth... Last one I bought was $1100 (they are well out of date), but I got a kind of bargain. Probably around $1500 - 1800. Maybe more if there are two of us who are nuts out there! They are now kind of a cool retro scope and there are 'better' things out there than a SN-9. Including most of the other vintage USO scopes. But it is a wicked cool piece for a USO geek like me!

Very cool catch!

Steiner C35 Gen 2 - Initial range trips and first hunt - Updated 9/30 with third hunt

You'll love the guide. You may be limited to ~4x **to be able to see the LRF display** but you can get tighter than that for detail.
Works for me. Intention is to use it on the mk12 mod H with the 2-12 Steiner. Then when i get the 22 arc mk12 mod 0 will likely be the leupold mk5 i have.
  • Like
Reactions: sgtsmmiii

CHINA IS F###ED

Off the top of my head, there’s a hundred years between the Spaniards colonizing parts of SEAsia, and Taiwan being part of China.

EDIT:

View attachment 8744787

This is what I’m familiar with.

Is there more to the story?
here is what i got in a quick look. conflict between mainland and island-2K years. original inhabitants were not Chinese or even "Asian". more like original people in Japan? they did raid Chinese coast. China sent some punitive expeditions. was a late 1500s war between Japan and Spain. Spain won and established forts in 1626. dutch drove them out in 1642. this opened the way to Chinese immigration to escape the mainland problems.
this brought conflict with the original occupants whom the Chinese considered sub human. Dutch driven out in 1642. Chinese immigrants after some threats China installed some troops. abusive and ineffective Chinese control fomented up to 30 violent uprisings in 19th cent. island was considered the most dangerous place in Asia,a lot of ship wrecks and piracy Perry tried to get compensation. England sent some gun boats in 1860s. neither got satisfaction. was raised to Chinese province from a dependency in 1887. 1895 japan got it in winning a war with China. Japan was sovereign there til 1945.
from then until the KMT retreat there they had control. was abusive,exploitative and brutal per KMT norms. it seems that a lot of trouble there after '49 was related to KMT corruption and insistence of China that Formosa was part of China. the US is what seems to have kept Formosa functional. there was a fear in the 50s that China might invade like in Korea. there were attempts to get Formosa under UN control because of KMT abuses.
so,i was wrong as Formosa was under Chinese control for spells. but it was not "part" of China til 1895. what to do about it now?
the book was originally written in 1957 (?) as a long worked on manuscript. couldn't get published til like 1997 (?). apparently concern about it being anti KMT,which it is,and pro commie,which it isn't. very complex book about a complex place and issues.

Steiner C35 Gen 2 - Initial range trips and first hunt - Updated 9/30 with third hunt

I find the image of the C35 to be better than the Guide, but, the LRF makes up for it by a mile.

The image of the Steiner is really really really good. Image on the Guide is totally adequate to do God's work and you'l know if that coyote is 100, 200, 300 yards away...
Good enough for me. Thought i might could do without a LRF seeing as most clip ons don’t have them. But they’re trending towards having them and i would definitely benefit with one. I was hoping it was on par with the Steiner. As long as i can zoom in a little more than 4x I’ll be happy. The hydra is a great little unit for 3in1 but it’s not the most suitable clip on. For the price of both units i can’t complain. If this Nocpix changes up the game i might be getting rid of both the hydra and guide to fund it. Ultimately I’m planning on the halo C when i actually have some real income.

SOLD WTS: Otto NoizeBarrier Micro

For sale:

Otto NoizeBarrier micro in-ear hearing protection. These were used very little, less than an hour. They work great, but I prefer over the ear. Includes everything that comes with them new including the manual, charging cable, extra silicone and foam plugs, and original box. I threw away one set each of the silicone and foam plugs that I had used with them, so all of the plugs that are included are new.

$325 shipped SOLD

I accept discreet PayPal or Venmo (F&F ONLY)

Thanks for looking!

Attachments

  • IMG_0780.jpeg
    IMG_0780.jpeg
    2.3 MB · Views: 25
  • IMG_0779.jpeg
    IMG_0779.jpeg
    1.9 MB · Views: 24
  • IMG_0778.jpeg
    IMG_0778.jpeg
    3.2 MB · Views: 26
  • Like
Reactions: phillyray and ACard