Rock River Arms LAR-8
Rock River Arms · Battle Rifle · In Production · 2005
Also known as: LAR-8 Standard Operator, RRA LAR-8
Overview
The Rock River Arms LAR-8 is an American AR-10/SR-25-pattern semi-automatic battle rifle chambered in 7.62x51mm NATO (.308 Winchester). Introduced around 2005, its defining feature is a forged 7075-T6 aluminum lower receiver engineered to accept inexpensive FN FAL-pattern magazines (both inch and metric) in addition to Rock River's own magazines, a solution to the scarcity and high cost of AR-10/SR-25 magazines at the time. It retains a direct-gas-impingement operating system with a multi-lug rotating bolt and cylindrical bolt carrier, and adds ambidextrous magazine-release and bolt-stop controls. Rock River guarantees roughly 1 MOA accuracy with match ammunition.
Specifications
| Weight (empty) | 4621 g (163.0 oz) |
| Overall Length | 1073 mm (42.24") |
| Barrel Length | 508 mm (20.00") |
| Action Type | Gas Operated |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Two Stage |
| Trigger Pull | 19 N (4.3 lbf) |
| Magazine Capacity | 20 rounds |
| Magazine Type | Detachable Box |
| Effective Range | 600 m (656 yd) |
| Barrel Rifling | Right Hand |
| Rifling Twist | 254 mm (10.00") |
| Number of Grooves | 6 |
| Frame Material | Aluminum |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Matte Black |
Calibers
- 7.62x51mm NATO · primary · 7.62mm NATO — also known as .308 Winchester, .308 Win, 7.62 NATO
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety
- Features: Direct Impingement, Free Float Handguard, Picatinny Rail, Ambidextrous Magazine Release, Ambidextrous Bolt Stop, Fal Pattern Magazine Compatibility, Folding Front Sight
Variants
- Rock River Arms LAR-8 Standard Operator — Operator
- Rock River Arms LAR-8 Elite Operator — Carbine
- Rock River Arms LAR-8 Varmint A4 — Varmint
- Rock River Arms LAR-8 X-1 — Carbine
Production
Production years: 2005-present
Civilian and law-enforcement semi-automatic rifle; production totals not publicly disclosed.
Origin
Country of origin: United States
Notes
The LAR-8 is offered in numerous configurations (Standard A4/Operator, Elite Operator, Varmint A4, X-Series) differing in barrel length (16-26 in), handguard, and stock. The FAL-magazine feed system was patented by Rock River Arms.
Background
Rock River Arms was founded in 1996 by brothers Mark and Chuck Larson, building a reputation on AR-pattern rifles and law-enforcement contracts before developing the LAR-8. When the company entered the .308 market, AR-10 and SR-25 magazines were both scarce and expensive, so Rock River patented a lower receiver that feeds from plentiful surplus FN FAL magazines instead, while also enabling ambidextrous controls uncommon on AR-10-pattern rifles.