AR-10 Precision Rifle Shopping - Need Some Input & Advice

pittfurg

Private
Minuteman
Mar 10, 2012
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Columbus, OH
Hey everyone,

Extremely long-time lurker here, and I've been browsing this forum for a while now in my quest for my next precision rifle. I have been a bolt gun enjoyer for the past 15 or so years, mostly in 30 caliber rounds (308 and in the past couple of years, 300 PRC) and some built-out rimfire stuff.

And now, for my next purchase I'm looking for a long-range semi-automatic rifle. And yes, I know there are plenty of threads about this very topic and I've absorbed the more recent-ish ones (since the market is always changing and evolving and innovating, and new companies show up and certain manufacturers go in and out of favor).

But rather than approaching this as "which one is best" I want to do something a little different: I'm going to list out what my short list is, given my requirements, and basically ask the question: are any of these objectively BAD choices? And let's define bad as: unreliable, hard to service and/or keep clean, hard to properly suppress, or requires a lot of additional work out of the box to enjoy with my requirements or wishes.

So, about those requirements, here's the list of things that I consider to be "table stakes" for this purchase (in no particular order of importance):

  • Being able to enjoy the rifle at ranges varying from 400 - 800 yards on steel; anything beyond that range would be a huge bonus since the friends I shoot with frequently go out to longer distances at ranges (or private land) with our bolt guns. And granted, I know we're talking about two very different platforms here, but I feel my current ARs in 5.56 or my National Match M1A on open sights can already handle the 100 - 400 ranges. Small groups at 100-200 yards nice, but I'm mostly just interested in consistent performance at raneg on 12- or 18-inch steel targets.
  • Being able to suppress out of the box. I'll be completely honest, I'm not a gunsmith; the most work I've ever done to my current rifles is replacing a muzzle device or some of the easier to change furniture, like stocks, grips, and such. I've never work on a gas system or replaced a barrel, so I don't have the tooling to, say, put on adjustable gas block or re-barrell something. Or maybe I do, but mostly, I worry about damaging the rifle or reducing its accuracy or performance since I've never done it. And yes, I can absolutely enlist the services of an armorer or gunsmith, but I'm really striving for out-of-the-box as much as possible. Therefore, any rifle with an adjustable gas system that comes standard is what I'd like to try to buy.
  • Longer barrels are preferred, if nothing else just to eke out as much velocity as possible for those longer ranges. I'm not a physicist but my understanding is that the difference between 16-, 18-, 20-, or 22-inch barrels can add several hundred feet per second of velocity (conditions permitting, of course). I don't have any illusions of carrying this rifle for anything up close (I have other rifles for that), but being able to shoot sitting, or from prone, is probably what this rifle is destined to do (or from props, if I decide to run it for something else). See above about replacing or upgrading a barrel.
  • As for calibers, I'm thinking just your standard .308 since I'm already "in the lifestyle" thanks to one of my bolt guns, even though every time I get a new gun, I go on a quest to find the best performing ammunition for that platform. I'm not averse to also exploring something like 6.5 Creedmore.
  • This isn't a race to the bottom on price; I know this is going to be an expensive endeavor, and I know there is probably money to be saved by building my own. But again, I'm looking to save some time and get something turn-key and provide light updates to fit the rifle more to me.
  • It's also worth mentioning: I don't hand load. Again, it's mostly a question of time and money right now, and most of my trips to the range are on factory ammo. I know that, ultimately, I will probalby end up there but right now, I seem to have had good luck with match-grade ammo for my other guns, so I'd like to keep doing that here.

So, with that in mind, here is what I've narrowed my choices down to:

  • Seekins Precision SP-10. I first ran across these rifles the last time I visited Euro Optic's warehouse out in Pennsylvania, and I see they get a fair amount of respect here. They tick all the boxes mentioned above, I think. I've been trying to find some posts or videos people suppressing them and how to adjust the gas block, since I've never had an adjustable gas block on an AR-pattern gas system.
  • LWRC REPR MKII. I've always eyed LWRC's with an envious eye for a number of years, but they've always been just a touch out of reach due to timing in my life. But now that I'm older and a little more financially stable, I wanted to make sure I gave them a shake here. There's a lot to like here, with a easily adjustable gas system, good fit and finish with a lot of upgrades that I'd probably want to do after the fact (like the PRS stock, upgraded trigger system, etc). I don't see a lot of love for them here, at least recently, so I'm not really sure why. The other thing that makes me a little leery is that they don't seem to embrace things like MLOK; it looks like for things like Arca rails or bipods, you need to screw in some rails to the bottom.
  • GA Precision GAP-10 G2. Similar to the REPR above, there's a lot to like here out of the box, like the adjustable block, and I think the handguard is a better system. The biggest question is lead time since these are built to order, but I'm not really in a rush.
  • American Defense UIC-10A. Similar to the Seekins, and I see that they get a lot of praise here too. They appear to be built to order as well and can provide things like from-the-factory muzzle devices to fit some of the more popular suppressors.

And for additional transparency, here are some others that were considered but I'm ruling out, and why:

  • FN SCAR 20S: After putting a lot of time and effort and energy and money and research into suppressing my 16S, I really don't want to go through that again. I really like FN, don't get me wrong. But given the price and what else I'd have to do to get it to run comfortably suppressed without the whole "void your warranty" discussion/debate, I'm going to pass on it.
  • HK 716: I just wish the barrel was longer! I think there's also some FUD out there around suppressing these and frankly, for the money these are going for right now, some of the other rifles on the above list (and this list) offer a heck of a lot more.
  • LMT MARS-H DMR: I really wanted to put this on the short list, but from what I can tell it doesn't come with an adjustable gas block, and I'm unclear on how well it performs suppressed. They look like a phenomenal gun.
  • KAC SR-25: Mostly just due to the current market and availability. I know I said this wasn't a race to the bottom on price, but I feel like I sit more in the "crazy not stupid" section when it comes to the investment I'm about to make.
  • Armalite: I just don't know enough; there's a lot out there but nothing I've found that is "prescriptive" and it seems like to meet my requirements list, some work needs to get done. I'm interesting hearing more about them though.

So yeah, after weeks of agonizing research here and other places, this is where I've landed. So as stated originally: are any of those choices objectively bad? Are there other factors for those mentioned above I'm overlooking.

Thanks for reading!
 
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Hard to go wrong with the Seekins as it checks all of the boxes you're after.

I am with you. I definitely think that I'm leaning towards that or the LWRC, and it's hard to argue with the price tag between the two. The other thing I like about the Seekins, specifically the 6.5, is it appears it's just a threaded barrel, no muzzle device, so I can either direct thread a suppressor or put on a device I like, which saves me some time.

This might be a dumb question for you (or anyone else here), but how much of a pain is it to adjust a gas system like that? I've just never done it; the closest I have today are selectors like my SCARberator.
 
Like any other rifle system, factory-made isn't going to compare to a custom build. Seekins and GAP are closer to small-shop assembled guns vice big factory production turning out dozens to hundreds per day.

What's your budget and (as you mentioned) what's your patience limit if having one built?

There are several good upper-lower receiver sets available now as opposed to ten or twenty years ago (some sets are between $200-400). A number of companies (Krieger, Lothar-Walther, Lilja, Proof Research, etc.) also turn out quality precision match barrels much better than mass-produced rifled tubes.

You have a very good selection of adjustable gas blocks available as well as heavy buffers.

Random examples:

Stag Arms blem receiver sets, $200:

1727811622955.jpeg

Diamondback (stripped) DB-10 sets, around $200:

Matrix SR25.jpg
 
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Like any other rifle system, factory-made isn't going to compare to a custom build. Seekins and GAP are closer to small-shop assembled guns vice big factory production turning out dozens to hundreds per day.

I appreciate all of this advice, but like I said, not really looking to build for this. I'd like to try to get something out-of-the-box, but with an eye towards quality. I agree sourcing the parts and building it myself is probably going to produce a more bespoke build, but the sad reality is that I doubt my ability to build it to spec the way a manufacturer does. I'll always wonder if I "did it right."