COLT 6920 M4 reciever, LILJA 20" 3 groove 1/7 twist, PRI GEN 3 Handguard, LMT Bolt & Carrier + CH, low profile gas block w/naked muzzle Everything new and onfired. Upper rec. and barrel extension are M4 cut. $950.00 I will split shipping & INS. email@example.com for specifics.