I have a Mega 300 Blackout but just can't connect with the round. It worked well on a pig hunt in Florida but looking to either replace it with a 14.5" 5.56 barrel or build a complete new upper in 5.56.
I know there are compatibility issues with Maten line, similar to most billet 308 AR upper and lowers, but assume Mega's AR15 billet lowers are milspec and compatible with any milspec AR15 upper. I don't see the qualification listed on their website, but wanted to confirm with those that have mixed Mega lowers with another manufacturer's upper.
If I go the new upper route, probably just build me a Mega upper anyway but like the options.