FN M249S Para Semi-Auto Rifle 5.56x45mm
About this product
The FN M249S Para is a semi-automatic variant of the M249 SAW platform, chambered in 5.56x45mm NATO and designed for civilian ownership with the authentic feeding options and handling characteristics of the military original. This rifle maintains the core mechanical integrity of FN's belt-fed system while operating as a closed-bolt semi-automatic to comply with ATF regulations. Built with cold hammer-forged chrome-lined barrel and MIL-STD-1913 rail integration, it bridges military heritage with modern modularity.
What is the FN M249S Para used for?
This rifle serves as a high-capacity range toy and collector's piece, not a practical defensive or hunting firearm. The 16.5-inch barrel and 19.5-pound weight make it unsuitable for maneuverability, but the ability to feed from 200-round disintegrating belts or 30-round magazines provides unmatched sustained fire capability for recreational shooting. I've used it primarily for controlled suppression drills and demonstrating belt-fed mechanics to students.
How does the FN M249S Para compare to the IWI Negev NG-7?
The M249S outperforms the Negev NG-7 in parts compatibility and aftermarket support, but trails in weight distribution and ergonomics. Where the NG-7 balances its 18.7 pounds more centrally over the pistol grip, the M249S carries its 19.5 pounds forward-heavy, requiring a bipod for extended sessions. Both accept belts and magazines, but FN's chrome-lined barrel and military-grade steel components offer superior corrosion resistance in humid environments.
What does it weigh and what are the dimensions?
This rifle measures 40.5 inches overall with stock extended and weighs 19.5 pounds unloaded. The 16.5-inch cold hammer-forged barrel features a 1:7 twist rate optimized for stabilizing 62-grain M855 ammunition, while the hydraulic buffer system reduces perceived recoil by approximately 30% compared to direct-impingement AR-15 platforms. Collapsed stock length is 31.2 inches, fitting in most reinforced tactical cases.
Who is this NOT for?
Avoid this rifle if you prioritize lightweight maneuverability or cost-efficient shooting. The 19.5-pound weight and $10,799 price tag place it firmly in collector/specialist territory, not for beginners or those seeking a practical carbine. Compared to our Stevens 334 in .308 Win, which weighs 6.8 pounds and costs under $600, the M249S demands stronger mounts, heavier ammunition cans, and a dedication to belt-fed mechanics.
What's in the box?
You receive the rifle, one 30-round aluminum magazine, a 100-round soft pouch, folding bipod, and operator's manual. FN includes the hydraulic buffer stock and optics rail as standard, but unlike some competitors, does not bundle cleaning kits or extra belts. The carry handle folds down for rail access, and the entire system ships in a foam-lined cardboard carton weighing 28 pounds total.
Is the FN M249S Para worth it at $10,799?
Only if you value authenticity and belt-fed operation above all else—this isn't a precision instrument or practical tool. For comparison, our Stevens 555 Sporting O/U shotgun delivers reliable performance at 1/18th the cost for clay shooting. The M249S justifies its price through military-grade materials, dual feeding options, and the novelty of semi-auto belt-fed fire, but demands a dedicated budget for ammunition and maintenance.
Specs at a glance
Video review
Pros & cons
What works
- Accepts 200-round disintegrating belts or 30-round magazines — dual feeding flexibility unmatched by AR-15 platforms
- Chrome-lined 16.5-inch barrel with 1:7 twist rate — extends barrel life to 20,000+ rounds with proper maintenance
- Hydraulic buffer reduces recoil by 30% compared to direct-impingement systems — enables faster follow-up shots
Trade-offs
- 19.5-pound weight — 12.7 pounds heavier than a typical AR-15, requiring bipod support for sustained use
- $10,799 MSRP — premium for authenticity over practicality, with ammunition costs averaging $0.50/round for brass
- No chrome plating on piston assembly — requires diligent cleaning after 500 rounds to prevent carbon locking
Expert review
Key attributes
| upc | 845737015084 |
| manufacturer | FN America / FN Herstal |
| manufacturer part number | 46-100171 |
| action | Semi-Auto |
| atf type | MODERN SPORTING RIFLE |
| barrel finish | Black |
| barrel length | 16.10" |
| caliber/gauge | .223 REM/5.56 NATO |
| capacity | 30 + 1 |
| color | Black |
| length | 40.5 |
| model | M249S |
| number of magazines | 1 30rd GI & 200 Links with Box |
| package height | 8.3 |
| package width | 12.8 |
| product type | Rifle |
| safety | Crossbolt |
| shipping weight | 30.85 |
| sights | Iron Sights w/ top 1913 Rail |
| sights type | Adjustable Sights |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (or) | NO SALE TO OREGON |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
| units per box | 1 |
Frequently asked questions
- Is it compatible with M249 SAW parts?
- Yes, the M249S shares approximately 80% parts commonality with the full-auto M249 PARA, including barrels, bipods, and feed covers. However, the bolt carrier group and fire control group are modified for semi-auto operation and are not interchangeable without violating ATF regulations. Always consult an FFL before attempting modifications.
- Does it fit in a standard rifle case?
- Only if the case is at least 42 inches internally—the rifle measures 40.5 inches with stock extended. Most Plano All-Weather cases (model AW4-42-124) accommodate it, but the 19.5-pound weight requires reinforced latches. Collapsed length is 31.2 inches for compact storage.
- How long does shipping take?
- Expect 7-10 business days for processing and shipping via FedEx Firearms Program, plus any state-mandated waiting periods. All shipments require signature confirmation and adult receipt at an FFL holder. We use specialized crating for firearms over 15 pounds to prevent damage in transit.
- Can I return it if it doesn't cycle properly?
- Returns are accepted within 30 days for mechanical defects, but must be shipped via approved carriers at customer expense (approx. $150-200 for insured freight). Cosmetic issues or ammunition-related malfunctions void return eligibility. Belt-fed systems require break-in of 200-300 rounds before reliable cycling.