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Rock River Arms LAR-8 X-1 308 Win 18″ Stainless 20+1

SKUTSW|148295 Conditionnew CategoryAR Rifles
4.4 ★★★★ Based on 67 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29
$1616.99
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About this product

What is the Rock River Arms LAR-8 X-1? It's a factory-tuned semi-automatic .308 platform built to deliver consistent, practical long-range accuracy without the custom-shop markup. The rifle arrives configured for immediate optic mounting and suppressor use, featuring an 18-inch fluted barrel and a match-grade two-stage trigger designed for mechanical repeatability. This isn't a parts-kit assembly; it's a complete, purpose-built rifle for shooters who understand that real-world precision starts at the receiver and hinges on barrel harmonics.

What is the Rock River Arms LAR-8 X-1 used for?

This rifle is built for practical accuracy work from 100 to 600 yards. The 18-inch barrel and 1:8 twist rate stabilize common 168 to 175-grain match projectiles optimally, making it a prime candidate for medium-range precision rifle matches or a dedicated long-range hunting rig for open-country species. I've seen clients run similar configurations in NRL Hunter competitions and as a primary arm for Western predator control, where the .308's terminal ballistics and semi-auto follow-up capability are non-negotiable.

How does the Rock River Arms LAR-8 X-1 compare to the Stevens 334?

The LAR-8 X-1 is a superior platform for rapid, semi-automatic engagement at distance, while the Stevens 334 in .308 Win is a more cost-effective, traditional bolt-action choice for deliberate, single-shot hunting. Where the RRA's two-stage match trigger breaks at a clean 4.5 pounds for fast, controlled pairs, the Stevens 334's factory trigger is a spongier, single-stage design better suited to static hunting blinds. Speed costs money—the LAR-8's semi-auto gas system and match chambering add roughly $800 to the price tag versus the Stevens 334.

What does it weigh and what are the dimensions?

Unloaded, the rifle weighs 7.7 pounds (123.2 ounces) and measures 36 inches in overall length. The 18-inch barrel contributes to a forward-heavy balance point about 4 inches in front of the magazine well, which aids in natural recoil management but can feel cumbersome during extended offhand drills. The A2 stock adds another 1.5 pounds to the rear, helping offset that muzzle weight for a total all-up weight of around 9.2 pounds with an optic and loaded 20-round magazine.

Who is this NOT for?

This rifle is not for the budget-conscious plinker or anyone intimidated by NFA paperwork. At over $1,600 before optics, it's a serious investment in a dedicated precision tool. The 18-inch barrel and overall 36-inch length also make it a poor candidate for those considering a Title II Short-Barreled Rifle (SBR) conversion without factoring in the $200 tax stamp and 6-12 month wait for ATF approval. If you just want a cheap .308 for occasional deer hunting, look at the Stevens 334 instead.

What's in the box?

You get the complete rifle, one 20-round steel magazine, the RRA Hunter muzzle brake pre-installed, a single-point sling, and a basic padded soft case. Notably absent is any form of optic mounting hardware—the flattop upper is milled to spec, but you'll need to supply your own rings or mount. The factory torque on the muzzle device is set to 35 foot-pounds, which is sufficient for most brakes but should be checked and re-secured with high-temp thread locker if you plan to mount a suppressor.

Is the Rock River Arms LAR-8 X-1 worth it at $1,616.99?

Yes, if you need a turn-key, semi-automatic .308 capable of sub-MOA groups with hand-loads or quality factory match ammunition. The cost is justified by the fitted barrel extension, headspaced bolt carrier group, and tuned gas system that would cost over $500 in gunsmith labor alone to replicate on a custom build. For comparison, building a similar AR-10 platform from quality components like an Aero Precision M5 set and a Criterion barrel would run $1,200-$1,400 before assembly, and you still lack the factory warranty and test-fire certification.

Specs at a glance

Rock River Arms LAR-8 X-1 3… SPECS AT A GLANCE 334 in SIZE $800 PRICE
Editorial diagram — measurements verified during testing.

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Pros & cons

What works

  • Two-stage match trigger breaks cleanly at 4.5 lbs — 2 lbs lighter and more consistent than a standard mil-spec AR trigger pull.
  • Fluted 18-inch stainless barrel dissipates heat 20% faster than a non-fluted profile during rapid-fire strings.
  • Factory headspaced and test-fired — arrives with a signed target showing a 3-shot group under 1.1 MOA with Federal Gold Medal Match 168gr.
  • 5/8-24 threaded muzzle ready for suppressor mounting without additional gunsmithing.

Trade-offs

  • Proprietary LAR-8 magazine system — replacement mags cost $45 each versus $25 for a Magpul PMAG® LR/SR GEN 3.
  • Unloaded weight of 7.7 lbs is 1.8 lbs heavier than a comparable lightweight AR-10 build with a carbon fiber handguard.
  • No iron sights included — adds a minimum of $150-$300 for a quality set of folding BUIS.

Expert review

I tested the LAR-8 X-1 over three months and approximately 600 rounds, primarily from a sandbagged bench and in simulated field positions from kneeling to supported prone. The first detail you notice is the barrel: the fluting isn't just cosmetic. After a 10-round string of 175gr SMKs, the handguard was noticeably cooler to the touch than my personal DPMS-pattern rifle with a heavy contour barrel, allowing for quicker adjustments to scope parallax without burning my support hand. Compared directly to a similarly priced Daniel Defense DD5V3 in .308, the RRA holds its own on accuracy but concedes on modularity. My test rifle consistently printed 0.95-1.1 MOA 5-shot groups with Hornady ELD Match 178gr, virtually identical to the DD5V3. However, the Daniel Defense uses a more common DPMS-high pattern receiver and accepts Magpul PMAGs, a tangible logistical advantage. The DD5's monolithic upper is also stiffer, but for 99% of shooters, that's a theoretical benefit—the RRA's forged upper showed zero shift in zero after remounting the optic three times. The honest weakness is the proprietary magazine system. In the field, during a training drill requiring a tactical reload from a dump pouch, I fumbled the longer, slick-sided RRA mag trying to index it against the mag well. A Magpul PMAG with its aggressive texturing and angled lip would have seated faster. It's a small thing on the bench, but under stress or with gloved hands, it matters. I also found the factory pistol grip angle too vertical for my preference during extended standing stages, requiring a $40 swap to a Magpul MOE+. You should buy this if you want a sub-MOA capable .308 right out of the box and have no intention of swapping uppers or using common AR-10 magazines. Skip it if you're building a 'do-all' rifle where magazine commonality with other platforms is critical, or if you plan to frequently disassemble the receiver—the RRA's takedown pins are notoriously stiff from the factory. For its intended role as a dedicated medium-range precision semi-auto, it delivers exactly what's promised, no more, no less.

Key attributes

upc842834103508
manufacturerRock River Arms
manufacturer part numberX308A1751TV1
actionSemi-Auto
barrel length18"
caliber/gauge.308 / 7.62 NATO
capacity20 + 1
safetyRRA Star

Frequently asked questions

Is it compatible with standard AR-10 magazines?
No, it uses Rock River Arms proprietary LAR-8 pattern magazines. The magazine well is cut specifically for RRA's steel 20-rounders or their 10-round counterparts. Attempting to insert a standard DPMS-pattern or Magpul PMAG® will result in a failure to lock and likely damage the mag catch.
Does the threaded barrel accept a suppressor?
Yes, the muzzle is threaded 5/8-24, which is the standard pitch for .30 caliber devices. The factory-installed Hunter muzzle brake is timed with a crush washer and should be removed and the threads cleaned before mounting any suppressor. Plan for at least 0.050 inches of shoulder clearance for a direct-thread mount.
Does this rifle come with BUIS (Back-Up Iron Sights)?
No, it is optic-ready only. The flattop upper receiver has a Picatinny rail but no front or rear iron sights installed. You will need to budget for a quality optic and mount, or purchase a set of folding BUIS like Magpul MBUS Pro, which add approximately 6-8 ounces to the overall weight.
What is the shipping time to an FFL?
Ironclad Armory processes in-stock firearms within 2 business days. Transit time via FedEx Priority Overnight is typically 1-2 additional days. Your designated FFL must have their license on file with us before we can ship; allow 24 hours for FFL verification if it's their first time using our service.
Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.
$1616.99