The p-15 base rifle is 100% american made features pofusa mil-spec p-15 receiver set and the e2 16.5 match-grade 5.56x45 nato barrel.The mil-spec bcg features the patented roller cam pin to ensure smooth operation.The mil-spec anti-tilt 6 position buffer tube comes standard with a mission first tactical minimalist retractable stock.The p-15 receiver set has been hard anodized black in color and features a 15 m-lok handguard.*california compliantAction: Direct ImpingementCaliber: 5.56 NATOBarrel Length: 16.50"Capacity: 10+1Trigger: Mil-SpecOal: 34"Weight: 6.30 lbsTwist: 1:8"Muzzle: A2 Flash HiderBarrel Length Range: 16" to 16.99"