There might be an issue with cooling if you conduct sustained fire in a near vacuum, but even on a light barrelled AR you're several magazines in before that arises, and if 90 rounds of 5.56 hasn't solved your initial problem, melting the gas tube is the least of your worries π
There might be an issue with cooling if you conduct sustained fire in a near vacuum, but even on a light barrelled AR you're several magazines in before that arises, and if 90 rounds of 5.56 hasn't solved your initial problem, melting the gas tube is the least of your worries π