Bushmaster XM15-E2S W/Stainless Steel HBAR and Weighted Stock

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. Variants include the Bushmaster M4-type Carbine, Patrolman series, QRC series, Bushmaster XM15-E2S, and the Carbon 15 line. The standard XM-15 has a forged 7075T6 aircraft-grade aluminum upper and lower receiver. Barrels of XM-15 firearms have a heavy profile and are hard chrome-lined 4150 alloy steel or 416 stainless steel. In Bushmaster's 2016 sales brochure, all new-production XM-15s are stated to be supplied with a 4150 steel barrel. The standard barrel has rifling of 1 turn in 9". E2S Series: The basic E2S is fitted with a 16-inch carbine-style barrel. E2S Target - 20" heavy-barrel target rifle with A2-style stock and carry handle upper, also available with 24" and 26" barrels. E2S Shorty - 16-inch version with a "shorty" handguard. 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 Dissipator - Variant with a Bushmaster-designed 16-inch "Dissipator" barrel. This mounts a disused gas block with a front sight at the 20" position with the actual used gas block in the carbine position and concealed under a rifle-length 12" handguard allowing more forearm support and room to accessorize the rifle. 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. QRC is chambered in 5.56x45mm with a 1:8 twist melanite coated barrel, M16 style bolt carrier group & mil-spec buffer tube. Patrolman Series: - 7" or 10.5" barrel "pistol" version with a free-float handguard and no stock. Also, available as a military or LE select-fire version. This rifle falls within the E2S Target family, but the barrel is all 416 stainless steel with no muzzle device and 18.5" from the Delta Ring to the end of the barrel. The end of the barrel is crowned. It does have the A2-style stock with fixed carry handle. The stock has a removable lead weight in a compartment, accessible from the butt. The single stage trigger is aftermarket and adjustable.