
Plaintiffs argued that both theories of liability fell within exceptions to the 2005 Protection of Lawful Commerce in Arms Act, which affords broad civil immunity to gun manufacturers. Just before the two-year anniversary of the massacre, nine families of the 26 victims of the shooting filed a class action lawsuit in Connecticut against Bushmaster, Remington Arms and others, seeking "unspecified" damages for the defendants' purported negligent entrustment and illegal marketing of the XM-15 rifle. Ī Bushmaster XM-15 was used in the December 2012 Sandy Hook Elementary School shooting. The Bushmaster XM15-E2S "M4 type" carbine first gained notoriety for its use in the October 2002 Beltway sniper attacks. Also available as a military or LE select-fire version. Patrolman Series: - 7" or 10.5" barrel "pistol" version with a free-float handguard and no stock.QRC is chambered in 5.56x45mm with a 1:8 twist melonite coated barrel, M16 style bolt carrier group & mil-spec buffer tube. QRC Series: Formerly known as ORC ("optics ready carbine"), but now styled as QRC ("quick response carbine"), are flat-top rifles without iron sights, provided with a simple 1x20 red-dot optic.This mounts a false gas block with a front sight at the 20" position with the real gas block in the carbine position and concealed under a rifle-length 12" handguard. E2S Dissipator - Variant with a Bushmaster-designed 16-inch "Dissipator" barrel.E2S Shorty AK - Shorty variant with 14.5-inch carbine SBR barrel with an AK-74-style muzzle brake permanently welded to the end to increase the overall length to 16 inches.E2S Shorty - 16-inch version with a "shorty" handguard.E2S Target - 20" heavy-barrel target rifle with A2-style stock and carry handle upper, also available with 24" and 26" barrels.E2S Series: The basic E2S is fitted with a 16-inch carbine-style barrel.The standard barrel has rifling of 1 turn in 9". In Bushmaster's 2016 sales brochure, all new-production XM-15s are stated to be supplied with a 4150 steel barrel. Barrels of XM-15 firearms have a heavy profile and are hard chrome-lined 4150 alloy steel or 416 stainless steel. The standard XM-15 has a forged 7075T6 aircraft-grade aluminum upper and lower receiver. Variants include the Bushmaster M4-type Carbine, Patrolman series, QRC series, Bushmaster XM15-E2S, and the Carbon 15 line.

The Bushmaster XM-15 series (or XM15 ) is a line of AR-15 style semi-automatic rifles and carbines manufactured by Bushmaster Firearms International, LLC.
