Description
The Franklin Armory Praefector-M, 6mm, 20″, 30rd, Magpul PRS Stock is a precision-oriented, modern sporting rifle built for consistent, long-range engagement. Chambered in the flat-shooting 6mm ARC cartridge, it combines a 20-inch match-grade barrel with a fully adjustable Magpul PRS stock to create a stable, repeatable platform for the discerning marksman. This is a rifle engineered for when a standard AR-15 just won’t cut the distance. It’s a system designed to deliver tight groups and reliable performance from the bench, in a competition setting, or when managing a predator population across a wide pasture. The price reflects its specialized role at $2457.15.
Key Features
- 6mm ARC Chambering: Offers superior ballistics over 5.56 NATO, with less wind drift and more retained energy at extended ranges.
- 20-Inch Match Barrel: Provides optimal velocity for the 6mm ARC round, enhancing its long-range potential and accuracy.
- Magpul PRS Gen3 Stock: Delivers a rock-solid cheek weld and length-of-pull adjustments for a perfect, repeatable fit behind the optic.
- 30-Round Magazine: Ensures ample capacity for extended shooting sessions or multi-stage courses of fire.
- Precision-Optimized Platform: The Praefector upper is built with tolerances and features dedicated to squeezing out maximum accuracy.
Specifications & Details
| Caliber | 6mm ARC |
| Barrel Length | 20 Inches |
| Magazine Capacity | 30 Rounds |
| Stock | Magpul PRS Gen3 |
| Overall Length (Approx.) | ~39-42.5 Inches (Adjustable) |
| Action | Semi-Automatic, Direct Impingement |
Weighing in at approximately 10.5 pounds unloaded, the Praefector-M is a stable platform that mitigates recoil and steadies the sight picture. The 6mm ARC cartridge itself is a key spec—it fires a high-BC 108gr projectile at roughly 2750 fps from this 20-inch tube, giving you a tangible edge past 500 yards. This rifle is drop-in ready on any mil-spec AR-15 lower receiver, meaning you can pair it with your trusted, familiar lower that already has your preferred trigger and grip. No gunsmithing required to get this long-range upper mated and running.
Who This Rifle Is For
This is for the shooter who has graduated from plinking steel at 300 yards and needs a tool for serious work further out. It’s for the PRS competitor looking for a gas-gun division advantage, or the hunter who demands ethical shot placement on coyotes or deer across Missouri’s open fields. It’s also for the prepared citizen who understands that defensive scenarios can, and do, occur at distances beyond the hallway. If your mission requires first-round hits on man-sized targets at 600+ yards with a semi-auto, this is your starting point. That said, it’s a specialized tool.
Pros & Cons
Pros: The 6mm ARC cartridge is a legitimate long-range performer, effectively doubling the effective range of a standard 5.56 rifle. The Magpul PRS stock is the industry benchmark for adjustable precision stocks, providing unparalleled stability. The 20-inch barrel extracts full ballistic potential. Using a common AR-15 lower keeps costs and familiarity high.
Cons: The 6mm ARC is a niche cartridge—ammunition cost and availability are higher than 5.56/.223. The rifle’s weight and length make it less maneuverable for close-quarters use. This is an investment at $2457.15, placing it firmly in the dedicated shooter’s domain.
Frequently Asked Questions
Q: What lower receiver do I need for this?
A: The Praefector-M upper assembly is designed to work with any standard mil-spec AR-15 lower receiver. You’ll need a compatible 6mm ARC bolt carrier group and magazine, which are typically included or specified for purchase separately.
Q: Is the 6mm ARC good for deer hunting in Missouri?
A: Absolutely. With proper 6mm ARC hunting ammunition (like 108gr ELD-M or soft-point loads), it delivers more than sufficient energy and ethical performance for whitetail deer within its effective range, which easily covers typical Missouri hunting distances.
Q: Can I use my existing 5.56 magazines?
A: No. The 6mm ARC cartridge requires specific magazines due to its different case dimensions. It uses modified .224 Valkyrie or dedicated 6mm ARC magazines, such as those from Duramag, which are widely recommended for reliable feeding.
Ready to extend your effective range with a purpose-built system? This Franklin Armory Praefector-M configuration is available at firearms-missouri.com for Missouri residents and nationwide. Check site inventory and initiate the secure process to have it shipped to your local FFL.
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