SIG SG 556 DMR
- Caliber: 5.56x45 mm NATO
- Weight: 8.2 lbs (3.7 kg)
- Length: 36 in (91 cm) (stock extended)
- Barrel length: 17 in (43.2 cm)
- Feed System: STANAG Magazines
- Fire Modes: Safe/Semi
The latest generation of the SIG 550 rifle series. The SIG 550 DMR is accurized variant of the SIG SG 556 designed for use as a Designated Marksman Rifle. Due to import restrictions by the BATF, SIG builds these new version rifles in the United States. They differ in that they have an aluminum lower receiver somewhat similar to the AR15, but take STANAG Magazines and have a rail on the upper receiver amongst other cosmetic details. They are also Semi-Auto only.