Sig Sauer M400 5.56 NATO AR-15, 16 Inch, Exeter NH Marked, Free-Float Handguard, IMI E1 Stock, Ambi Charging Handle, Muzzle Brake, 2 PMAGs
This customized Sig Sauer M400 stands out with an Exeter, NH–marked receiver and a clean, upgraded configuration. It features a free-float aluminum handguard with a full-length top Picatinny rail, an ambidextrous extended-latch charging handle, an IMI Defense E1 adjustable stock, and an aftermarket multi-port muzzle brake. The bore is excellent, and two 30-round Magpul PMAGs are included.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are markings from prior handling and use. Please refer to the photos for details.
What's Included
- 2x 30-round Magpul PMAG polymer AR-15 pattern magazines
- IMI Defense E1 adjustable carbine stock (installed)
- Ambidextrous extended-latch charging handle (installed)
- Free-float aluminum handguard with full-length top Picatinny rail (installed)
- Aftermarket multi-port muzzle brake/compensator (installed)
- Custom "ΜΟΛΩΝ ΛΑΒΕ" engraved ejection-port cover (installed)
Built on the AR-15 platform, this M400 uses a direct impingement operating system and a 16-inch threaded barrel stamped "5.56 NATO" at the muzzle. The aluminum receiver set wears a matte anodized finish and is the flat-top A3 style with a forward assist and shell deflector.
The free-float aluminum handguard provides a full-length top Picatinny rail that aligns with the receiver. Accessory slots on the handguard expand mounting options, while an aftermarket multi-port muzzle brake helps manage muzzle movement.
Controls and furniture are thoughtfully upgraded. An ambidextrous extended-latch charging handle improves access, and an IMI Defense E1 adjustable stock offers flexible fit. A rubberized ergonomic pistol grip with textured panels enhances handling.
This rifle carries an Exeter, NH receiver marking associated with early U.S. production. It has no iron sights installed. Capacity is 30+1 with AR-15 pattern magazines, and two 30-round PMAGs are included.