Sig Sauer M400 Tread 5.56 NATO 16" 30 rd MLOK BDX Sierra 3 Scope

Out of Stock


Sig Sauer M400 TREAD, Semi-automatic, 223 Rem, 556NATO, 16" Stainless Barrel, Magpul SL-K Stock, M-Lok Handguard, Black Finish, 3.5-10x42mm SIERRA 3 BDX Rifle Scope, 1 Mag, 30Rd RM400-16B-TRD-BDX

Categories: Semi Auto Rifles
Condition: New
Manufacturer: SIG SAUER
Model: M400 Tread
SKU: 798681639823
UPC: 798681639823
Vendor: Gunprime
Reviews (8)
By Blaine on 09/09/21
Sales made it right

Just got the product and my wife is begging me not to sell it. There was an oversale of the item but I was contacted
by a sales representative who worked with me to put together another package at the same price. His responses
were apologetic and it seemed like he cared about my satisfaction; and I am well satisfied with his efforts and the

By John C. - Ohio on 07/15/21
Couldn’t be happier

Found it with internet search at 4:00 on Wednesday afternoon. Called the store to discuss model and received friendly and knowledgeable service. Ordered at 4:20. Received shipment email at 4:45. Gun received at FFL at 9:30 AM on Friday. I truly can’t believe. This won’t be my last purchase at Gunprime. Thanks so much.

By J carrillo on 03/28/21
Awesome AR

Awesome Ar15 very well made the bdx scope and the m400 make a great combo.
No dislikes at this Time only have had it for 1 week

By JR on 03/16/21
As described, great communications, fast shipping

Lots of research into buying the Sig M400 Tread, you get a bit of an upgrade with rifle and at a entry level price point, smooth action and the BDX system is awesome.

By JT on 02/10/21
Great Service!

My experience was fast and amazing. Placed my order and had it at my FFL within a couple of days! This was by far the best experience buying a gun I've ever had.

By Bill K on 12/22/20
Fast shipping and accurate description

I haven't fired the firearm yet however I can comment on the accuracy of description and timeliness of shipping. The firearm was as described NIB containing everything you would receive if you purchased at the local dealer. The packaging was original and in excellent condition. The shipping was fast and immediate to the designated FFL. I purchased in Illinois so there is a three day waiting period and the firearm had arrived within the waiting period even though it was ordered on a Saturday. As stated I have not shot the firearm but I am excited about the BDX scope and have already purchased the rangefinder that will pair to it via Bluetooth.

User uploaded images:

By Jay W on 12/15/20
Mlok issue

I got this AR last month and this is my first AR. After playing with it for a month, I have two issues. The scope is too big on the top and I need to replace it with a red dot sight. And the Mlok is too heavy and upgrading to a free float needs a lot more work to replace the barrel nut. Sig provides a Mlok without top rail. If Sig has a free float available, I will give it a 5 star.

By Great Value Rifle on 11/29/20
Great sporting rifle, great value

This is my first experience buying a "sporting rifle". Overall a great purchase. Only issue keeping me from giving it 5 stars is that that scope makes it difficult to get a good grip on the charging handle. Either going to have to get a different optic or different charging handle.

Write your own review