These rifles are the newest version of the M4 LE done for us at the Spikes factory upper and lower receiver are Cera coated in Magpul FDE and Grey and come with the Walther upgraded barrel fitted with FSB Magpul CTR stock handguard rear MBUS sight MOE grip and trigger guard in matching colours and a 25 round black dog mag These come with 16 inch barrel as standard or can be fitted with a 12 inch if required