Spikes is always a good option - Spikes Tactical M16 Bolt Carrier Group (BCG)

I’ve run about 3,000 rounds through the lightened (10.5 oz) BcG and I’m not showing an access of wear and tear. The only real downside to this thing is that the holes they used to lighten it are a pain to clean. Let’s just get this out of the way as well…If you’re not running an adjustable gas block you don’t need the low mass carrier, just run the standard weight bolt carrier group. As far as running the lightened BcG with an adjustable gas block you can run less gas and lighter weight on the buffer and get similar dwell times. So is it worth the pain of cleaning? Mmmm sure maybe �