Convert your .40 S&W BANSHEETM from AR pistol to pistol caliber carbine with the CMMG(R)Radial Delayed Blowback Rifle Conversion Kit. The 15EML Handguard and RipStock are available in six Cerakote color options to best match your firearm. Note: 16.140 S&W Radial Delayed Blowback barrels require a different bolt than our 5and 8barrels. Bolts for 16.1barrels are the only switch needed to work with existing 5or 840 S&W Radial Delayed Blowback carriers.Kit Includes:16.140 S&WBarrel40 S&W Bolt Assembly (16.1Barrel Specific)Barrel NutCMMG EML15 Handguard(Choice of Cerakote color)CMMG RipStock(Choice of Cerakote color)