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This 30rd Colt USGI magazine has been modified with our extreme duty, extended life, 28rd "Red Magazine Spring". This unique & highly cost-effective spring is manufactured exclusively by Specialized Armament. As the backbone of any USGI 30rd M16 magazine, the Red Spring will outperform and outlast many newer chrome-silicon springs costing 75%-100% more! Contrary to popular myth, the red surface coating is an industrial dye used for identification purposes only. It is not a rust inhibitor, it is not paint, it has no magical properties and it will wear off eventually or chip away over time. The ID color is only present to help avoid confusion with other springs. These mags should only be loaded to 28 rounds. The Red Spring was engineered with an operating capacity of 28rd's and it needs the extra space to function correctly with a higher load rating. Yes, the other 2rds can be forced into the mag without damage but reliability will be sacrificed. It’s all about reliability.
How long will the Red Spring last? We really do not know the answer. For past 12+ yrs, several of us have been testing (abusing) original proto-types and they just keep going. A couple years ago we chop-sawed an original spring in half, put both pieces back into a mag and it is still functioning! The Red Spring’s ultimate purpose is to enhance the basic reliability of Colt .223/5.56mm rifles and carbines in all situations.
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