Sig Sauer Caliber Exchange, Sig Calxmcx5b556tap Cal-x Kit, Sigmcx, 5.56 Nato,

Factory replacement 5.5" barrel for the mcx rattler genuine replacement barrel for the 5.5" 5.56x45mm nato rattler.Complete with barrel and gas block assembly..

Length: 5.50"
Model: Caliber Exchange
Finish: Nitride