Hoping for some advice from the experienced folks here. I'm in the market for a XM177 style GBB (don't mind if it's an E1 or E2 model). Which models of these do people think of as the current best, either for performance or external quality? (And parts availability!) I'm leaning towards the WE XM177 right now, but it lacks markings and I'd really like one with "COMMANDO" or "XM177" trades.
My absolute ideal would actually be a retro CAR-15 (Colt 607) without the forward assist and partial or no fence on the receiver, but it looks like only G&P makes those as GBBs and I've heard not great things about their GBBs.
Cheers!