SIG Sauer M400 SDI Adjustable Precision Stock .223 Remington 5.56 NATO FDE/Tan Rifle
Caliber: .223 Remington, 5.56 NATO · Capacity: 30+1
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Specifications
Action Semi-Automatic
Finish FDE/Tan
Sights Standard Sights
Weight 7.5 pounds
Capacity 30+1
Grip Safety No
Optic Ready Yes
Barrel Length 16 inches
Manual Safety Yes
Overall Length 36.5 inches
Trigger Safety No
Caliber / Gauge .223 Remington, 5.56 NATO
Threaded Barrel Yes
Magazines Included 1
Ambidextrous Safety No
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
Description
Product Overview
The SIG Sauer M400 SDI is a semiautomatic rifle chambered for .223 Remington and 5.56 NATO. It combines a 16-inch threaded barrel with a direct-impingement operating system, a two-stage match trigger, and an adjustable precision stock for a more adaptable shooting position. The FDE/Tan Cerakote finish provides durable surface protection, while the rifle’s optics-ready rail supports a wide range of sighting setups. Standard sights are included for immediate use, and the 30+1 capacity provides ample ammunition for training, competition, and general-purpose rifle applications.
Key Features
- 16-inch threaded barrel accepts compatible 1/2x28 muzzle devices
- Chambered for .223 Remington and 5.56 NATO ammunition
- Two-stage match trigger supports controlled, consistent trigger operation
- Adjustable precision stock allows the length of pull to be tailored to the shooter
- FDE/Tan Cerakote finish helps protect the rifle’s metal surfaces
- Optics-ready top rail supports the addition of a red dot sight or scope
The SIG Sauer M400 SDI offers a versatile AR-pattern rifle configuration with a match trigger, adjustable stock, and optics-ready design.
4.5 | 2 Reviews
Free and Fast Shipping to the Lower 48 States.
- SKU:
- RM400SDI16BVTAC
- UPC:
- 798681588459
- BUDS ID:
- 102766
Compatible Ammo
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Customer Reviews
4.5 out of 5
2 total reviews
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Latest Reviews
Codie H.
6 years ago
Verified Purchaser
The gun I purchased is...
The gun I purchased is amazing other than the gun showed up without its magazine. I am unable to shoot it until I find out how to get ahold of you guys. So if someone could reach back out to me that would be great. Thank you.
David C.
6 years ago
Verified Purchaser
I'm going to submit an...
I'm going to submit an initial review primarily because the interwebs don't seem to have many on this model of the Sig M400, the SDI VTAC.\r \r My first reactions upon unboxing were that this is a nice looking rifle. Profile is great and weight just right. Control manipulation is fantastic, truly ambidextrous. Yeah yeah, I can imagine the purist "tacticool" dudes making noise about not needing full ambi controls, as for me I found them easily handled. \r \r Before the trial run and after mounting a Leupold RDS I thought as an experiment I'd try Shawn Ryan's 36/25 yard zero ( https://www.vigilanceelite.com/blogs/vigilance-elite-blogs/36-yard-zero ) - three rounds later, four clicks right, two clicks up, everything was shiny. \r \r As to the "why" of this two year old model still being so readily available across the various online retail sites I've found myself wondering -- after I shot it, what am I missing here? Did Sig go too far in taking a mid-level gun like the Tread and trying to get it to play with the upper class kids? Were they trying to get agency recognition for the mature M400 (pre "Tread"?) Was what the market would accept price wise wrongly estimated? I have no answer. However, what I did arrive at was the front end furniture is excellent. The two-stage "match" trigger isn't top-shelf but it's no slouch either. It's comes with a carbon steel nitride coated barrel finished off with a compensated flash hider. Also included was one of Kyle Lamb's VTAC slings. Icing on the cake would have been an M-Lok QD adapter and a couple of swivels, but that's a minor complaint. After a bit of quick mental math to add all of these features to the base M400 Tread, the feature set was in the ball park price wise, very possibly less, with the SDI as built. \r \r Does the Sig M400 SDI cost too much for what you get? I'll leave that for you to decide. As for me, I purchased one so there my answer.
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Retail Availability
Bud's Gun Shop - Lexington, KY
1105 Industry Road, Lexington, KY 40505
Bud's Gun Shop - Sevierville, TN
2270 Two Rivers Blvd, Sevierville, TN 37876
Uncle Lee's - Greenville, KY
820 Main St, Greenville, KY 42345
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| Rating |
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| Action | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic |
| Barrel Length (in.) | 16.0 | 16.0 | 16.0 | 16.0 | 16.0 |
| Caliber / Gauge | .223 Remington, 5.56 NATO | .223 Remington, 5.56 NATO | .223 Remington, 5.56 NATO | 5.56 NATO | .223 Remington, 5.56 NATO |
| Capacity | 30 | 30 | 30 | 30 | 30 |
| Finish | FDE/Tan | FDE/Tan | Matte Black | FDE/Tan | Burnt Bronze Cerakote |
| Manual Safety | Yes | Yes | Yes | Yes | Yes |
| Optic Ready | Yes | Yes | Yes | Yes | Yes |
| Overall Length (in.) | 36.5 | 34.5 | 32.0 | 37.25 | 32.75 |
| Threaded Barrel | Yes | Yes | No | Yes | Yes |
| Weight (lbs) | 7.5 | N/A | N/A | 6.65 | 6.65 |
| Sights | Standard Sights | N/A | Standard Sights | N/A | N/A |
| Actions | Current Item |
