Steve Elar Mora, of Pacific Beach, has pleaded guilty to manufacturing a chemical that resulted in an explosion at a marijuana dispensary he operated. Mora, 34, also pleaded guilty to being a felon in possession of an AR-15 assault rifle in the incident, which happened on July 21, 2014 in Clairemont. The rifle was found in his residence near Mission Bay High School. Sentencing was set for Aug. 21 by U.S. District Court Judge Barry Moskowitz. Mora faces a maximum sentence of 10 years in federal prison. He remains free on $75,000 bond and must abide by a 9 p.m. curfew, according to court documents. It was believed that Mora was trying to extract tetrahydrocannabinol, known popularly as THC, from marijuana in a process known as blasting. The U.S. Attorney’s office said this was a dangerous risk to human life, though no one was believed injured in this explosion. Mora’s previous convictions include burglary and marijuana sale. Mora, who owns an unnamed business in Pacific Beach, has agreed to forfeit $1,178 in cash, the rifle, ammunition, a gun case and all drug paraphernalia, records say.