Convert your AR15 to the SIG SAUER MCX Virtus. Complete with Virtus barrel and gas block assembly.
SIG SAUER offers upper assemblies and caliber exchange kits in various barrel lengths. All NFA rules apply to installation of these upper assemblies to lower receivers and caliber exchange kits to upper receivers. Upper assemblies and caliber exchange kits with barrel lengths less than 16 may only be affixed to lower receivers which (1) are not recorded as a rifle lower by the manufacturer and do not have a stock attached to the lower receiver or (2) registered with the BATFE as a short barreled rifle (SBR).
SIG SAUER CAL-X KIT, SIGMCX, 300 BLK, 16IN, TAPERED LUG SPECIFICATIONS
Model: SIG MCX
Caliber: 300 BLK
Brand: Sig Sauer
Manufacturer SKU: CALX-MCX-16B-300-TAP