Consumer Gun Review: Sig Sauer M400 AR15

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5 responses to “Consumer Gun Review: Sig Sauer M400 AR15”

1. 

   Rick l Rogers

   July 14, 2016

   I recently bought a sig Sauer M400 tried open sights Romeo 3 red dot Nikon 3X9 The best group I could get at 100 yards was 6.5 5 shot group 1 time every thing else was worse 62 green factory ammo. All sig wants to do is give me a run around. I am taking it back to the dealer that I bought it from at least they are trying to help me

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   1. 

      Cary Kieffer

      July 17, 2016

      Rick, wasn’t my article but I have a couple of sigs, both are excellent. A few points that may help you.

      Ammo: You didnt say what you were shooting. Get some Federal Premium, Hornady or Blackhills. THEN you’ll have removed ammo as the likely cause.

      Sight: you mentioned 3 kinds…as far as irons go..when my eyes went to hell I didnt know it…till you put on glasses the first time. So could be your own eyes…

      Red Dot: depending on the size of the dot and style of target it can be hard to shoot good groups because you cover the target with big dot…try a round target that you can fit the dot into and still see some target around it. Also turn down the brightness till you can barely see it, makes it smaller looking and easier to aim more precisely than 100% bright does.

      Scope: you cant rule out a bad scope OR improper mounting….I’ve had both happen. Try a known good scope and make sure you torqued the bolts down right. I forgot once and had me perplexed for days…it was tight enough to feel ok to my hand but WAY under torqued….Hope something helped. The Sigs are good weapons, I wouldn’t condemn one until I had that stuff totally ruled out.

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      1. 

         Rick Rogers

         August 29, 2016

         Sig only has moa 4 in at 100 with brandy match grade 55 gr8. It just makes it they say it’s with in spec. The first one would not even hit 1 foot group the shop I bought it from put a new upper on it. Because sig gave us both a smoke screen and wouldn’t do any thing. Also it has a new Nikon 3×9 on it

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2. 

   andrew

   September 24, 2012

   I have been really interested in this weapon for a while now, I know sig is quality otherwise SEALs wouldn’t trust their lives to,them (p226), but I have yet to see anyone give an accuracy report for the m400. I for one would love too see how well the,1:7 twist prints down range.

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   1. 

      David Wilder

      November 25, 2012

      I’m new to the AR market and was having a difficult time deciding on which one to purchase, until I saw the Sig. I have to admit I purchased the M400 based on my experience with their hand guns and for the most part I am very happy with my decision. I was however rather disappointed with the accuracy of the weapon and spent a lot of hours trying to improve the 2” grouping I was getting at 100 yards using 223 55gr federal ammunition.

      I’m an avid reloader so I armed myself with several rounds of different powders at various weights but staying with the 55gr bullets, with little success. Then I tried the federal 5.56 62gr NATO round with vast improvement. Apparently the 1:7 twist likes the heaver bullet at the higher pressure of the 5.56 cartridge. Those 2” groups turned into .25” and smaller, much more to my liking.

      As far as the weapon itself, it is a Sig through and through. Items such as the ambidextrous mag release and the tensioning screw which keeps the upper and lower half tight are things you won’t find on other weapons. I did however change the trigger group to a Geissele SSA Enhanced trigger set which if you’re using it for hunting is a must reducing the trigger pull from 8lbs to 4.5lbs.

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