This Ruger® AR-556® Semi-Auto Rifle operates with a traditional, direct-impingement system and comes equipped with 11" Magpul® M-LOK® handguard for attachment of compatible accessories, and a Sig Sauer® Romeo4T red-dot sight for accurate targeting. The waterproof, IPX-8 rated, and fog-proof sight features motion-activated illumination to power up and down with motion and a 100,000+ hour runtime. The 6-position M4-style buttstock on the AR-556 allows rapid adjustment according to the clothing and tactical gear the user wears, or for moving from open environments to tight quarters. The medium-contour cold-hammer-forged barrel has a 1:8 twist rate that stabilizes bullets from 35 to 77 grains. A Ruger flash suppressor is attached to the barrel with a 1/2"-28 thread. The barrel nut and delta ring are designed for 1-person removal and installation of most standard carbine length handguards. The anodized flattop upper receiver is made from aerospace-grade 7075-T6 aluminum, and includes a forward assist, dust cover, and brass deflector. The Ruger AR-556 Semi-Auto Rifle includes one 30-round Magpul PMAG® magazine and operates with 5.56 NATO or .223 Remington ammunition.

• Operates with direct-impingement system
• 11" Magpul M-LOK handguard
• Sig Sauer Romeo4T red-dot sight
• 6-position M4-style buttstock
• Heat-resistant handguard
• Medium-contour cold-hammer-forged barrel
• 1:8 rifling twist
• Ruger flash suppressor
• Anodized 7075-T6 aluminum flattop upper receiver
• Forward assist, brass deflector, and dust cover
• Includes one 30-round Magpul PMAG magazine
• Operates with 5.56 NATO or .223 Remington ammunition