Unfortunately I've already got a spare BCG, am using the Raptor charging handles, and plan to buy a 16 inch in .308 next round, but they got a pretty good deal going on the 18 inch at the moment - tempting as a "spare" something but just isn't in the plan for me (although I'll think about it a bit more first
)..
$370 off if you buy their standard .308 18-inch upper, with the Aero ambi charging handle, and the nitride BCG. Brings it to ~$507..
Granted in the world of AR parts you get a lot of sales that's like 42% off, a very good sale for this company.