Magazine Options for the SCAR 17S

SCAR 17 Magazine options

The FN America SCAR 17S is, in the opinion of many, one of the best battle rifles out on the market. It fires a 7.62×51 cartridge but the recoil is oddly soft for a rifle chambered in .308 Winchester. The short-stroke gas piston system allows the gun to keep on firing in all manner of conditions. Even though it only has a 16.25 in. barrel with 1:12 twist, it is accurate out to 800 meters. So about SCAR 17 magazine options — how should you feed it?

FN offers magazines in two different capacities. 20 rd mags or 10 rd mags. The SCAR 17S magazine (those discussed in this article, as of this writing) is actually a modified FN FAL magazine. The SCAR 17S and FAL magazine bodies are the same. FN just cut a mag catch notch into the side of the mag body, removed the front notch and changed the feed lip shape a bit. Then they added a plastic bumper to the base plate.

Edit: Now, three years after this article first ran, there are several more options of SCAR 17 magazine to choose from!

SCAR 17 Magazine options

#ThrowbackThursday: This article originally ran Aug 24, 2016.

These mags are great but they are a bit pricey and they weigh a lot. Empty, the factory 20 rd mag weighs 8.6oz.

For a lighter option, there are aftermarket polymer magazines. One of the first to come to market was Molon Labe Industries. They made a universal polymer magazine that they can cut to different lengths and have different capacities. Regardless of size, the magazines are all the same price.  They come in 5, 10, 15, 20, 25 and 30 rd capacities. I have had some issues with reliability with the 25 round mags. Fail to feed. Also when loading the rounds into the magazine, the magazine tends to swell a bit and does not drop free if you need to fix a malfunction. They are lighter than the factory magazine though. A 20 rd mag weighs 6.1oz and the 25 round magazine weighs 8.1oz. One thing nice about the Molon Labe Industries magazines is their giant base plate. It is perfectly flat and a little wide so it acts like a monopod.

SCAR 17 Magazine options


Another contender in the polymer magazine category is Moses Mag. They started off by making polymer magazines for FAL pattern rifles. And since the FAL magazine is not that different from a FAL magazine, it was not that difficult to alter the mold and make a polymer magazine for the SCAR17S. The magazine is the lightest of all the SCAR17S compatible magazines. Empty it weighs a mere 4.6oz. That is almost half the weight of the factory FN magazine. The Moses Mag SCAR-H magazine holds 21 rounds of .308 Winchester. However, if you load it to a full 21 rounds, you will have a difficult time inserting it on a closed bolt. So it is best to leave it at 20 or open and lock the bolt for the full 21.

SCAR 17 Magazine options

The final magazine is basically an extended metal magazine similar in design to the FN magazine. ASC makes this long metal magazine and it holds 25 rounds. Weight wise it is not that bad at just 8.1oz. Still lighter than the factory magazine. Both the ASC magazine and the Moses Mag magazine have sloped base plates. While you can monopod the rifle on the magazine, all the weight is concentrated on that one narrow section of the magazine. Both magazines are equally priced at below $30 each.


SCAR 17 Magazine options

SCAR 17S Magazine Options

FN SCAR 17S .308/7.62x51mm 20-round factory steel magazine

ProMag SCAR 17S .308/7.62 20-round black polymer magazine

FN SCAR 17S .308/7.62x51mm 10-round factory steel magazine


Maglula FN SCAR 17S Lula Magazine Loader

Gonna be doing a lot of shooting? Check out this FN SCAR mag loader.

SCAR 17S magazine options





  • CALIBER: 7.62x51mm
  • OPERATION: Short-stroke gas piston
  • MAG CAPACITY: 10 or 20 Rd.
  • WEIGHT: 8.0 lb.
  • BARREL LENGTH: 16.25″
  • TWIST RATE: 1:12 RH


Semi-auto only

Rotating, locking bolt


Hard-anodized monolithic aluminum

MIL-STD 1913 accessory rails at the 3, 6, 9 and 12 o’clock positions

Adjustable folding front and folding/removable rear iron sights


Hammer-forged, chrome-lined, fully free-floating



Telescoping side-folding polymer stock

Adjustable cheekpiece

A2-style pistol grip


Ambidextrous safety lever and magazine release

Charging handle may be mounted on right or left side

Enlarged trigger guard for easier access when wearing gloves

Composite polymer trigger module


Steel or aluminum body

Low friction follower


SCAR 17S Review

Looking to learn more? Read NRA’s Steven Buis review of the SCAR 17s on American Rifleman:

“For me, practical ergonomic characteristics are critical to the success of a firearm’s design and very often 7.62 mm rifles come up a bit short in that category. With this system, however, the safety selector, magazine release, and charging handle are conveniently located, the buttstock is stoutly built and comfortable, and the weight is evenly distributed across the length of the rifle. One shortcoming relating to practical ergonomics is the SCAR’s short rail system, which leaves a large amount of exposed barrel. For many, this is not an issue. For me, I prefer to be able to extend my hand farther out, supporting 70 percent of the rifle’s weight with my off hand and 30 percent with my shooting hand.”

SCAR H (SCAR Heavy) Magazine Options

  • Mark

    Um so get the original FN factory mags because the other ones suck. I had that hypothesis going into the article so good to know.

  • Charlie

    Actually, I have had very good performance from ProMag 20-rnd SCAR17 magazines. I own 26 of the FN steel mags, and they are very good. I bought 2 ProMags for testing and really punished them for about 5 months. They were also very good. So I bought 20 more ProMags (at less than half the price of the FN steels). That was three years ago and I have not had any single problem with any of them. ProMags are much lighter than the FN Steel mags and they are a LOT easier to disassemble for cleaning. I bought one Thermold magazine last year for testing and I have been brutalizing it continuously since receiving it. The only thing that I decided to change on the Thermold mag was to use a box cutter and finish cutting out the magazine catch depression so that it is an actual hole (like the FN and ProMags) which feels like it gives a better and deeper gripping area for the magazine catch. It hadn’t given any problems before I modified it (30 seconds to cut the rest of the plastic depression) but I just felt that an actual hole would give a better grip for the mag catch. Thermold is also easier to disassemble than the FN steel mags but does not feel as sturdy as the ProMags. I keep all my magazines fully loaded all the time and none of them have demonstrated any problems from doing that. I was concerned about the polymer mags, but they have not shown any tendency to spread the lips or bodies or have problems from the pressure against the magazine lips. Very happy with the FN steel, and ProMag and Thermold polymer mags. On the other hand, I had ten of the Molon Labe magazines and they were nothing but junk. Sides of the mags swelled so much when fully loaded that they could not be inserted in the mag well, lips were so poorly designed that they deformed after only a single weekend fully loaded and produced constant double feeds and failure to feeds. They cost me more than the FN steel mags but at the time there were no other polymers available (2013 I think). I should have bought ONE to test first, but I thought they would be okay and I wanted polymer mags, so I ordered ten (for nearly $600 bucks!!!). Junk. Absolute junk. No returns either. I kept one as a reminder and threw the rest in the rubbish bin. I wouldn’t have anything from Molon Labe again even as a gift.