I took the plunge – owner of a new SIG M400 Tread

I had been looking to add a full-size AR-style rifle to my safe. I’ve used, owned, and built AR rifles, carbines, and pistols for years, but the only one I currently owned, but rarely shot, was a customized Del-Ton 7.5-inch pistol. I found the blast and noise, even with a suppressor, to be excessive, and the short barrel was so over-gassed that clean up, even after a short range session was a chore.

I had been reading the forum to see what SIG Sauer had to offer, and I stopped by a few local gun stores to see if anything was available in the used racks (there were no SIGs) and to gauge the market price. Much to my surprise, one of my local haunts, which is a stocking SIG dealer, had three M400 Treads in stock for the price of $849.99. They also had a Tread Coil, as well as some of the more expensive piston models. I looked at both the Tread and the Coil and decided that the $500 difference in price (the Coil was $1,349.99) really didn’t justify what you received. I like the looks of the slim handguard on the Tread, and don’t care for the vertical foregrip. I also have a Mepro RDS that is much better than the Romeo5 (in my opinion), and the trigger can always be upgraded later if I don’t like it.

Apparently, the dealer received some type of incentive from SIG as even on their website and in their computer system, the Tread was listed at $1,049.99. Total cost out-the-door including tax was $909.49.

All I was able to do today was get it out of the box (with a date on 10-May-2022 on the label), do a quick clean (not much was necessary), lube, and mount the RDS and BUIS (I read a number of posts regarding issues with mounting a MLOC rail on the front of the handguard and the height disparity between the MLOC rail and the rail at the rear of the upper receiver. I didn’t take a micrometer to both rails, but they look close enough to at least try co-witnessing with the RDS; I’m using a FAB Defense BUIS set. The rail I mounted at the muzzle is 5 slot generic aluminum rail that I had in my parts box, and it went on without problem). The RDS needed a slight tension adjustment of the toggle locks, but nothing else. Lastly, I swapped out the Magpul stock with a MFT minimalist stock that I also had in the parts box.

Tomorrow, I plan on getting out to my range and sight in the RDS, and hopefully the BUIS, as well as make sure that everything works as designed.

Also, I didn’t get an Accu-wedge nor any of the yellow patches, just the carbine, one 30 round Pmag, the obligatory lock, manual, advertising, and sticker.

P.S. - Photos later, too dark tonight.