Why M4's have reliability issues…and why it's our fault! By Michael Pannone December 24, 2008 I fired 15,000 rounds through a semi-automatic M4/M4A1-type direct-gas-impingement (DGI) carbine in 31 weeks without a single malfunction attributable to anything except bad ammunition or bad magazines, with a grand total of 9 malfunctions. The least number of rounds fired between cleanings was 960 rounds, …

By David Crane defrev at gmail dot com Colt Defense’s last new offering is the Colt Extended Range Carbine (ERC), which is a 5.56x45mm NATO (5.56mm NATO)/.223 Rem. select-fire, match-grade rifle/carbine designed to allow the end-user to engage targets in excess of 600 meters away when utilizing a 16-inch (16") barrel, and in excess of 650 meters when utilizing a …