Aero Precision M4E1 Threaded Barreled Upper 5.56 Carbine Length ATLAS R-One – 16″

This Aero Precision M4E1 Threaded upper receiver group comes completely assembled with 16” 5.56 barrel and the ATLAS R-ONE M-LOK handguard. This barreled upper receiver group does not include BCG or charging handle allowing you to choose your favorites for your build. The upper receiver is, however, fully assembled with forward assist and dust cover. The M4E1 threaded upper is made from forged 7075-T6 aluminum with a billet machined look that matches the lower and handguard. The ATLAS R-ONE free float handguard is 15” and features a 1.3” inner diameter that surrounds the low profile gas block and carbine length gas tube.

Features:

• M4E1 threaded upper receiver
• Forged 7075-T6 aluminum
• Assembled forward assist and dust cover
• 15” ATLAS R-ONE M-LOK handguard
• Hardcoat anodized
• 16” 5.56 NATO barrel
• Machined from Chrome Moly Vanadium
• Carbine length gas system
• 1:7 twist rate
• Threaded 1/2×28
• A2 flash hider
• Salt Bath Nitride finished

The 16” barrel is machined from Chrome Moly Vanadium steel with a salt bath Nitride finish and a 1:7 twist rate for stabilizing heavier rounds. It is threaded 1/2×28 with an A2 style flash hider, a lightweight and effective option. High pressure tested and magnetic particle inspected ensure this barrel is accurate and reliable.