Getting close...

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10 years 1 month ago #42912 by funfred
Getting close... was created by funfred
to becoming an actual, active member.

Long story, short...
Recently, a Jeep guy got me interested in .308 semi-s after decades of laxness on my part. I had always wanted the AR10 and now, well, these first components are in my possession...almost, I have to pick up the mount Friday.
Web pics, but you get the idea.

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Of course, all the relevant questions arise...
- Whose back-up sights? Magpul Pro.
- Barrel break-in? We'll see.
- Sling? Don't know.
- Case? GunGuard or Pelican...or Starlight.
- Do I keep a record of every shot? Never have before, but I've never owned such a classy, capable firearm. I'm ready to be serious about my marksmanship.
- Do I keep you guys apprised? Hell, yeah! How else am I gonna learn as much?
The following user(s) said Thank You: jtallen83

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10 years 1 month ago #42918 by Siscowet
Replied by Siscowet on topic Getting close...
Awesome! Is that an Armalite rifle, or did you build from scratch? Keep us apprised of your progress so we can learn from you as well.

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10 years 1 month ago #42925 by funfred
Replied by funfred on topic Getting close...
Store bought, Armalite A10SBF.

Clicking the pics reveals MFG's nomenclature.

FIrst lessons learned...

- Just because a one-piece low-rise unitized mount will allow the scope's bell to clear a full-length rail doesn't mean the reticle's housing will clear the base. I had originally gone with an one-piece ERA-TEC with 1.10" of rise. The clearance would have been very close for the bell-to-rail dimension. The scope, however, wasn't able to settle into the rings as the reticle housing rested on the mount's base.

- Arguably, a low scope height over the barrel bore is desirable. That was my thinking as I pursued my originally planned Spuhr SP-4601 with a rise height of 1.18". It was brought to my attention that the barrel to shoulder alignment on an AR platform does not allow the same rules as a standard stocked firearm like a bolt gun. When it comes to scope height on an AR, some rise is actually desired for an ergonomic sighting position.

- A cantilevered mount on the AR10 may not be necessary, depending on optics, but if you wanted to transfer that scope/mount to an AR15 you would need the forward offset. The Steiner is fairly large with an eye relief of 3.6-3.7". I didn't need a cantilevered mount but using a standard base had it mounted all the way forward on the receiver leaving me no wiggle room. There was doubt.

- I settled on the SP-4616. It gives me clearance for the reticle housing, additional clearance(1/4"+) for the bell, and piece of mind for various shooting positions where eye relief is a concern.

Actual pics upon assembly come this w/e.

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10 years 1 month ago - 10 years 1 month ago #42944 by Libertarian623
Replied by Libertarian623 on topic Getting close...
Fred - I think the Sp-4616 is going to be about perfect. Have you decided on glass yet, before you buy I would make sure it all fits together well and brings the eyebox to where you need it. I am really looking forward to seeing your final product.
Last edit: 10 years 1 month ago by Libertarian623.

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10 years 1 month ago - 10 years 1 month ago #42946 by funfred
Replied by funfred on topic Getting close...
I have all the above, minus the mount. Hopefully, the mount will be in tomorrow.

As I patiently await putting a round in the chamber, I've fingered and eye-balled the rifle from most angles, inside and out. It's definitely mil-grade in finish which is kinda a shame when they ask $3100. They make no apologies about it. The RRA's I looked at were very well finished.

The one thing that particularly bothered me was the rail-to-rail alignment*...you'd think it would be perfect or, at least, have no noticeable-to-the-eye misalignment. The quad handguard is ever so slightly canted. I assume this can be corrected but how does one ensure the rails will align on the same plane when re-torquing the barrel nut? The quad rail has a pin that interfaces with the barrel nut so...wtf?!?

At a minimum, I might get lucky by just loosening/retightening the handguard lockring. The issue will definitely need to be addressed before iron sight work-outs.
Hopefully, I won't have to send it in. I've already waited decades for it and, one would think, what's another 4-6 weeks? Well, it's another 4-6 weeks, after I've had the opportunity to drool all over it. :D

*I'm not flippin' out about it...just think a little more diligence in Armalite's assembly process might be in order. They're gonna hear about it, among other things, when I ask how to ensure zero error in the rail alignments.
Last edit: 10 years 1 month ago by funfred.

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10 years 1 month ago #42948 by Libertarian623
Replied by Libertarian623 on topic Getting close...
Fred make sure you order a bore guide and Nylon brushes from Brownells ASAP. If your going to try and milk every ounce of accuracy out of the system ( and it looks like you are ) your going to want these.

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10 years 1 month ago - 10 years 1 month ago #42949 by funfred
Replied by funfred on topic Getting close...
Bore guide, yes.
Nylon brush, not according to ArmaLite. They insist on brass only in their SS barrels.

Frankly, I'm a bit gunshy about any brushes in a barrel and I think ArmaLite's procedure is alarmingly over-scrubbed when it comes to brushing. It's almost like they want you to screw it up by running a brush, round-trip, multiple times after each shot for the first 10 shots.

The whole cleaning routine is gonna give me a stroke. :)
I'll think of a process that's less unnerving.
Last edit: 10 years 1 month ago by funfred.

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10 years 1 month ago #42950 by Libertarian623
Replied by Libertarian623 on topic Getting close...
The first ten shots are important if there is a problem you will see it , just remember to lube it a ridiculous amount during the breakin,. After the tenth shot and not finding any problems its onward. I shoot about 5 rounds and clean then I am done. Consider it broke in, most the barrel manufactures will tell you anything more is total BS. Along with metallurgist's,shooters and makers.

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10 years 1 month ago #42952 by funfred
Replied by funfred on topic Getting close...
Yup, that's my understanding. I've read quite a bit about it from field practitioners to barrel makers, etc.
Their bottom line is, it's all BS. Almost to a man, they disapprove of excessive cleaning or the need for extended break-ins.

On the creativity end of things, I have a plan.
- I'm gonna thoroughly douche/scour my .308 boltgun's barrel.
- Upon close, magnified inspection of a NEW brush's bristle ends, I'll determine if "lapping" the brush with some fine emery cloth while chucked up in a drill has any effect on cleaning up the ends. I'm assuming they are just chopped/pinched/cut off leaving some undesirable points. Yeah, those points will get worn down by use, but why start off that way?
- Anyway, THEN, I'm gonna put my new, "dressed" bore brush through the spic-n-span boltgun's barrel to break in the bristles and maybe give them a "set".
- At that point, I'll have a lot fewer concerns about shoving it down the throat of the AR.

Brushes are relatively cheap, even good ones. I'll be buyin' a few in case my creativity isn't a viable idea. :banghead:

I have various rods or the Otis cable.
The cable, invariably, has a coiled set in it. The loose end pushes/drags its way down the wall of the barrel as it's fed through...I don't like that.

Gotta check out the cleaning threads to see what folks are using for cradles, rods, etc.
I have a Dewey rod but attachments have mostly been a miss for availability...maybe I'm looking in the wrong places.

I don't have a dedicated cradle for the AR platform...another thing that would be nice to have.
Sinclair's Solvent Port, Tipton's "Best Gun Vise" and Wheeler's Mag Block all appeal to me for cleaning purposes and general assembly/disassembly.

I'm just gettin' started. (Like I've never done this before :rolleyes: ). I just wasn't as anal about it. My current cleaning kits and chemicals ain't gonna cut it. (Read: old, empty and worn out).

My former cleaning bench/vise/cradle was the couch, coffee table, tailgate, kitchen sink... :rotfl:

Just got a final e-mail from Hakan Spuhr. We had been discussing the various mounts. He agrees the SP-4616 is a good decision.
It seems I'm on the right path...

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10 years 1 month ago #42953 by jtallen83
Replied by jtallen83 on topic Getting close...

funfred wrote: The one thing that particularly bothered me was the rail-to-rail alignment*...you'd think it would be perfect or, at least, have no noticeable-to-the-eye misalignment. The quad handguard is ever so slightly canted. I assume this can be corrected but how does one ensure the rails will align on the same plane when re-torquing the barrel nut? The quad rail has a pin that interfaces with the barrel nut so...wtf?!?

At a minimum, I might get lucky by just loosening/retightening the handguard lockring. The issue will definitely need to be addressed before iron sight work-outs.
Hopefully, I won't have to send it in. I've already waited decades for it and, one would think, what's another 4-6 weeks? Well, it's another 4-6 weeks, after I've had the opportunity to drool all over it. :D

*I'm not flippin' out about it...just think a little more diligence in Armalite's assembly process might be in order. They're gonna hear about it, among other things, when I ask how to ensure zero error in the rail alignments.


I had the same issue with an Armalite upper this last summer. They ended up replacing the rail, took just under two weeks to get it back in my hands. Call and ask for Mario, he'll square you up.

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