16" 1/7 twist nitrate barrel, Property of US Marked M4 carbine with double heat shield front handguard and Matech rear BUIS USGI sight. Possible trades: Sig 365 X Macro grip modules and 12 or 17 rd mags, VP 9 mags, CZ P10F or C pistol, let me know what you have. FLDL and FLCWP preferred, must be legal to own, no felons. If it's up it's available don't bother to ask, meet SpringHill area. Thank you