Description
The RRA LAR-40 A4 Mid-Length System AR-15 is a purpose-built carbine chambered in 40 S&W, designed to deliver the terminal performance of a pistol cartridge in the familiar, controllable platform of an AR-15. It features a 16-inch barrel with a mid-length gas system, a six-position collapsible stock, and ships with a 30-round magazine. This configuration offers a reliable, low-recoil option for home defense, competition, or recreational shooting where common pistol calibers are preferred.
Key Features
- Chambered in 40 S&W for effective terminal ballistics and lower recoil compared to rifle calibers.
- 16-inch barrel with a mid-length gas system for smoother operation and reduced felt recoil.
- Six-position collapsible stock for adjustable length of pull to fit any shooter or body armor.
- Includes a 30-round magazine for ample capacity in defensive or competition scenarios.
- Built on a mil-spec compatible A4 upper receiver for durability and accessory mounting.
Specifications & Details
| Caliber | 40 S&W |
|---|---|
| Barrel Length | 16 Inches |
| Gas System | Mid-Length |
| Stock | 6-Position Collapsible |
| Magazine Capacity | 30 Rounds |
| Finish | Black |
This rifle is built to the robust standards you expect from Rock River Arms. The mid-length gas system on a 16-inch barrel is the sweet spot for reliability and shootability, reducing bolt carrier velocity for less wear and a softer impulse. When it comes to home defense, the combination of manageable recoil, high capacity, and the 40 S&W’s proven stopping power in a platform you already know how to run is a compelling argument. The total package weight typically hovers around 7.5 pounds unloaded, making it easy to maneuver in tight spaces. It’s compatible with many standard AR-15 parts and accessories, and the magazine is designed to work with common 40 S&W pistol mags, simplifying your logistics. Available at firearms-missouri.com for Missouri residents and nationwide.
Who This Rifle Is For
This carbine is for the shooter who wants the defensive capability of a pistol cartridge in a rifle platform. It’s ideal for home defenders prioritizing low penetration risk and fast follow-up shots, or for competitors in PCC divisions who want a edge with a harder-hitting round. It’s also a great choice for recreational shooters who already stock 40 S&W for their handguns and want a long gun that shares ammo. At $1114.08, it represents a dedicated tool for a specific mission profile.
Pros & Cons
Pros: Significantly reduced recoil and muzzle blast compared to 5.56mm, making it easier to shoot accurately under stress. Ammunition commonality with many service pistols. Lower over-penetration concern in residential settings than high-velocity rifle rounds. The mid-length gas system is known for its smooth, reliable cycling. It’s drop-in ready with no gunsmithing required for standard use.
Cons: Ballistic performance and effective range are limited compared to rifle cartridges. Ammunition can be more expensive per round than 9mm. Magazine options may be more limited than for more common AR calibers. That said, for its intended role inside 100 yards, these trade-offs are often acceptable.
Frequently Asked Questions
Q: What magazines does this RRA LAR-40 use?
A: This model is designed to use proprietary or compatible 40 S&W magazines made for the AR platform, which are often based on common pistol magazine designs. It ships with one 30-round magazine.
Q: Can I use my existing AR-15 lower receiver with this upper?
A: No, the RRA LAR-40 requires a dedicated .40 S&W lower receiver due to differences in bolt face, magazine well dimensions, and feed ramps. It is not a simple upper swap onto a standard 5.56mm lower.
Q: Is the 40 S&W effective for home defense from a 16-inch barrel?
A: Absolutely. The 40 S&W gains noticeable velocity from a carbine-length barrel, increasing its terminal effectiveness while maintaining the manageable recoil and reduced over-penetration risk that makes pistol-caliber carbines a smart choice for home defense scenarios.
Ready to add this versatile pistol-caliber carbine to your collection? Contact us to check availability and start the FFL transfer process.
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