One Horse Express M81 Camo 16" 5.56 NATO/.223 AR-15 Rifle (SKU: OHX-AI01-2) is a 6.5 lb semi-automatic rifle featuring an M81 camo finish and a factory-installed Atrius Forced Reset Selector (FRS). 

Specifications & Features
Caliber: 5.56 NATO / .223 Remington
Action & Gas System: Semi-automatic direct impingement with a mid-length gas system and .750 steel low-profile gas block
Barrel: 16-inch 4150 CrMoV with a SOCOM profile and 1:8" twist rate
Receivers: 7075-T6 aluminum with a Type III hard anodized finish
Handguard: 15-inch M-LOK free-float rail V3
Trigger & Controls: Schmid single-stage curved trigger, Breek Arms Warhammer charging handle, and single-side Atrius FRS selector (Safe, Semi, Super-Semi)
Furniture: THRiL™ CCS 6-position adjustable stock and THRiL™ RS pistol grip
Buffer & Muzzle: H2 buffer with a 7075 aluminum mil-spec carbine tube and a mil-spec A2 flash hider (1/2×28 thread)
Capacity: Includes a 30-round THRiL™ magazine