Sig M400 Review - We all know Sig Sauer, especially their handguns. However, their guns are an entirely different animal. For too long I let their big guns fly under the radar. That was until a friend of mine asked me about the Sig Sauer M400 Tread, a pre-built AR-15 designed to introduce rifle owners while offering an entry-level price point. It has a great name and sounds a bit funny, but is Sig Sauer everything it says it is? Read on to know.

The Trad is a good rifle. Still undecided how I feel about the handguard with MLOK slots on the front half. The M400 is super modular so swapping is a breeze, but I feel like it should be included instead of taken apart. It also doesn't include out-of-the-box visuals, which I'm always scornful of any company I buy from. The Tread is an entry-level rifle that should be ready out of the box.

Sig M400 Review

Sig M400 Review

Good news for left-handed shooters: the M400 tread is completely inconspicuous, housing the safety, magazines, and QD points on both sides of the rifle.

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I will say that the tread is surprisingly accurate out of the box. I threw one of my red dots, zeroed it, sat on the bench and started taxiing. The standings made the group a little wider, but the balls were easy to hit on target.

I went to work wearing the LPVO to test the long ranges. I have had similar results, but my rifle shooting at 100 yards seems to use some practice. I found the groups to be inches and changed except for the flyers. It opens up shot groups that come out 2-3 inches and I'd still say it's pretty powerful.

I hesitate to say the tread is reliable as I am not 100% sure. I had a couple of malfunctions with the cheap bullets, but the high quality brass bullets were great. After a few hundred rounds, the M400 began to run flawlessly regardless of ammo type.

It's also worth mentioning that there is apparently a replacement line available for the M400 tread. It's very modular and definitely geared toward learning about or getting into AR-15s.

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The Sig Sauer M400 Trade is a very solid rifle. A privilege that can be had for less than $800. The only thing not particularly noticeable. It's definitely designed for someone looking to get their first AR-15 for less than a grand. It's not perfect, but it's cheap, easy to learn/understand, and works. At this price point, I don't know what else you could want. I personally build mine for experience and to better understand how my rifle works, but it's not for everyone. That's where the Sig Sauer M400 Trad comes in.

Richard Douglas is a long time shooter, outdoor enthusiast and tech geek. He is the founder and editor of Scope Field, a columnist for The National Interest, Cheaper Than Dirt, The Daily Caller, and other publications. They are excited about SIG SAUER's newest addition to their M400 series, the Trad "Hunter" model. You are not alone.

SIG SAUER first introduced their M400 series over a decade ago, with the first version released in 2010. The M400 concept is SIG's entry into the world of budget-friendly AR-15s. These rifles differ from SIG's pricier rifles, such as the piston-drive platform MCX Virtus Patrol, which are generally closer to the straight action accepted as the "standard" for ARS. Until recently, the current models of the series consisted of the basics: a standard 16-inch barrel rifle, an 11.5-inch gun, and a higher rifle variant that came with some factory upgrades such as an optic and flat trigger. There's also a larger-frame cousin, the 716i Trade. This AR-10 shares much of its DNA with the 5.56 models above, but is chambered in 7.62 instead. Never a company to rest on its laurels, SIG is now expanding its M400 family with two new models announced for 2021: the Switchblade (which will be covered soon) and the Predator, which I've spent the last few months getting to know.

Sig M400 Review

The Predator model represents a slight departure from the existing variants of the M400 lineup. While every other rifle in the trade tries to offer what most shooters expect in the feature sets and configurations of modern AR-15s, the Predator chooses to buy into some of these conventions. Although based on the ubiquitous 5.56/.223 gas-operated AR platform many of us know and love, SIG chose to remove the “standard” in some key areas. The two that stand out the most to me are: the butt and the hand guard. Instead of a standard telescoping stock on a 6-position buffer tube, the Predator uses a stock system similar to that often found on precision rifle chassis. The pull length is adjustable with the retractable batpad, and the comb height is customizable. As for the handguard, an unusual rectangular profile was chosen in an effort to increase stability when resting the front of the rifle on a surface or on tools such as a shooting stick. The M-LOK fore-end, as well as the upper forend at 12 o'clock of the AR handguard, lacks a Picatinny rail along its entire length (or at least several openings toward the end of the muzzle). The only part of the image train is located in the upper receiver itself.

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Some live-fire testing using Caldwell's rifle gong - the yellow dot at the end of the path - as our target.

Otherwise, the Predator AR is familiar to the experienced shooter. The build, functionality, grip and control are all where they should be – and credit to SIG for including the elusive selector switch, an option I always like. They also carry the ambi mag release system from older M400 models, which is shorter than the ambi selector. Completing the contrast is the Predator's light green "Elite Jungle" Cerakote finish, which is meant to properly tame the desert environment. SIG chose this style and design with a specific segment of the rifle market in mind: the Predator would be an AR optimized for hunting — specifically hunting game animals like coyotes and bobcats, hence the model's name.

This was SIG's first iteration of the discontinued Predator-titled AR-15 before the new green version.

It is the second Predator model in the M400 family intended for hunters. They introduced the v1 Predator in 2017 after a relatively short production run during the year. Unlike this new version, it was initially offered in .300BLK and 5.56 and featured a standard telescoping seat and round ALG handguard. The good folks at SIG believe the updates chosen this time will serve the hunting market better than the original Predator. Are they correct? When they offered to loan TFB one of the new rifles for testing and evaluation, I welcomed the opportunity to find out.

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When I opened the box, my first impression was positive. As I've come to expect from SIG, the Predator feels built with good quality proportions and finish. Dry firing revealed a nice crisp and smooth trigger – not a match by any means, but for an AR with an MSRP of $1099.99, no complaints. You could certainly do worse for the price these days. The handguard and precision-style buckle were different than usual, but thankfully not cramped or uncomfortable. I found the stock length pull and comb height adjustment to be easy to adjust and stay firmly in place when locked. The only notable miss of that initial test was simple: the three M-LOK panels marked "tread" were cheap and flimsy. When I first saw them in the photos, I assumed they were meant to be used as case attachments, but in reality they are just decorative. They vibrated slowly and I later discovered that they began to disintegrate as they lost their glue quickly during live-fire. If you buy a tread gun, take these items and throw them away. Otherwise, the gun looked good to go and I was looking forward to a day at the range.

Checking and marking the first group I shot from the Predator. After a few rounds, we were able to get the rifle teams on target a little better.

SIG sent one of the specs, the SIERRA3BDX 2.5-8x32mm, mounted on the ALPHA2 30mm mount to the display. To zero it and begin testing, we place the rifle on a bench 100 yards away from a paper target. The gun shot well, and even though we only had a 200-round allotment (thankfully, 2020-21 ammo prices) for this review, it went through almost every malfunction or problem. Given the price point, I didn't expect it to be necessarily tacky

Sig M400 Review

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