The m4-sbr-m militia model carbine is franklin armory's 7.62x51 nato/.308 win battle rifle with factory-installed bfsiii binary trigger.This is not a sbr, as the 14.5" barrel has the franklin armory triumvir muzzle device pinned & welded.Bfsiii not for civilian sales in: ca, ct, dc, de, fl, hi, ia, md, nj, ny, ri, and waAction: Semi-AutoCaliber: 308 WinBarrel Length: 14.50"Capacity: 20+1Trigger: BFSIII AR-C1Safety: AmbidextrousOal: 33.50"Weight: 9 lbsStock Description: Adjustable Magpul CTRMuzzle: TriumvirSights: Magpul MBUS Front & RearBarrel Description: Light ContourTwist: 1:10"Barrel Length Range: 14" to 14.99"Weight Range: 9 lbs to 9.99 lbsHand: RightStock Finish Group: Black