If it's in your budget, I'd keep it as-is for a backup and buy or build something more up to date. 7 years ago where I live it was next to impossible to go full metal and good internals. Now you can get pretty much anything you want and at a far more reasonable price. Are you going to join a team? if so wait until you do and match up gun type with team mates so you can borrow and lend mags. Also parts and tech work becomes easier...
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