BudsGunShop.com - Are they assembled by J.R.A

yes the optic does have the battery and there is no way for us to know the Barrel date you can call Century and ask them at 561-908-7993 or email support@centuryarms.com

Brandon, the battery is included and Buds Customer Service will need to have their Inventory Dept verify the barrel date at 1-859-368-0371 9am-9pm EST Mon-Fri. or use the Blue Chat now button at the bottom right corner 9am to 9pm Mon - Sat and 9am to 7pm Sunday.