Rock river arms lar-15 entry tactical is a basic model ar from the box simple and ready to shoot.It has a 16 inch chrome moly m4 profiled barrel, a2 flash hider, ergo sure grip pistol grip, 6 position tactical carbine stock, m4 handguard with double heat shields, and fires 1 moa at 100 yards.This rifle can be kept simple like the m4 that troops carry into combat or customized from muzzle brake to buttstock.Included with each rifle is one magazine, lps-1 wipe, rra case, manual, and warranty.Metal Finish: BlackAction: Semi-AutoCaliber: 223 RemBarrel Length: 16"Capacity: 30+1Trigger: Two-StageSafety: ManualOal: 36"Weight: 7.50 lbsStock Description: 6 PositionMuzzle: A2 Flash HiderReceiver Material: 7075 T6 AluminumSights: A2 FrontBarrel Description: 4140 Chrome MolyTwist: 1:9"Barrel Length Range: 16" to 16.99"Weight Range: 7 lbs to 7.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black