Description
The Sig Sauer M400 Rose Kit is a complete rifle package rather than a bare carbine, built around SIG Rose program for women entering the shooting sports. MAG5 Firearms stocks it with a 16-inch threaded barrel, rose gold controls, a free-float M-LOK handguard and a ROMEO5 GENII red dot already included.
Why a Kit Beats a Bare Rifle
A bare AR-15 needs an optic before it is useful, and a decent red dot costs real money. The Sig Sauer M400 Rose Kit includes a ROMEO5 GENII, which is the same sight people buy separately for carbines in this class.
That turns the package into something usable on the first range trip instead of a project waiting on a second purchase.
The M400 Platform Underneath
Rose gold controls are the visible difference, but the rifle under them is a standard M400: a 16-inch threaded barrel, an aluminum receiver with a continuous top rail, and a free-float M-LOK handguard.
Free-floating matters more than it sounds. Because the handguard does not touch the barrel, a sling or bipod load does not shift point of impact on the Sig Sauer M400 Rose Kit.
Sig Sauer M400 Rose Kit Specifications
| Manufacturer | SIG SAUER |
|---|---|
| Model | M400 Rose Kit |
| Part Number | RM40016BROSER5X2 |
| Caliber | 5.56 NATO |
| Capacity | 30+1 Rounds |
| Barrel Length | 16 inches |
| Barrel | Threaded |
| Receiver | Alloy Steel, Black Anodized, Picatinny Rail |
| Controls | Rose Gold |
| Handguard | M-LOK |
| Stock | Six-Position Magpul SL, Black |
| Grip | Reduced Angle |
| Optic Included | SIG ROMEO5 GENII |
| UPC | 798681716593 |

Fit and Adjustability
A six-position Magpul SL stock adjusts length of pull, which matters far more for smaller-framed shooters than the industry treated it for decades. Getting the stock length right is the difference between a comfortable rifle and one that never gets shot.
The reduced-angle grip is more comfortable for most hands than the standard A2 shape, and the controls are placed for a normal reach rather than an oversized one.
Sig Sauer M400 Rose Kit Threaded Barrel and Accessories
The muzzle is threaded from the factory for a muzzle device or a suppressor, with no gunsmithing required.
M-LOK slots take lights, hand stops and bipods directly, and the continuous top rail keeps the included optic in plane with a magnifier if one gets added later.
Availability and Transfer
MAG5 Firearms is a licensed FFL dealer in Pennsylvania. This rifle ships new in the factory box with the magazine, the optic and SIG documentation, transferred through your local FFL.
It feeds standard AR-15 magazines, so magazines, ammunition and accessories are all inexpensive and universally available.
Other Sig Sauer M400 Rose Kit packages and complete AR rifles are listed in our rifle catalog. Factory specifications are published by SIG SAUER.
Every Sig Sauer M400 Rose Kit sold by MAG5 Firearms ships new in the factory packaging with the accessories SIG SAUER includes, and transfers to your chosen FFL. The Sig Sauer M400 Rose Kit is a regulated firearm and we verify licensing before any order leaves the shop.





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