I have a NEW LW-15 lower receiver made by New Frontier Armory. This receiver is complete and ready to shoot. I have cut and pasted some info below. These are great lightweight polymer lowers. Complete* Lower - ready to pin onto upper and fire!!! Lightweight – weighs in at 1.6 lbs – That’s 7.2oz lighter than a standard lower Lightest most durable composite polymer lower on the market today Low maintenance / easy cleaning / scratch resistant Accepts all standard MIL SPEC uppers and lower parts Features the accu-group composite fire control system with 4.5lb trigger pull Can accommodate any brand MIL SPEC LPK upgrade Reversible safety to accommodate left or right hand shooters Zero Slop” fit eliminates the need for wedges Lifetime warranty against any manufacturer defects when used as directed. Included and assembled with lower: Complete lower parts kit, pistol grip, commercial buffer tube, buffer, buffer spring, and six position M4 style stock $150 FTF Everett area. ID required.