![]() ![]() However, an extractor spring with too much pressure will cause feeding problems. Too little pressure and the extractor slips off the empty brass as it tries to pull it from the chamber. ![]() The extractor spring provides the tension necessary for the extractor to hold the cartridge case. During firing, the extractor pulls the empty case from the chamber, or, when unloading, it extracts a loaded round, and the ejector kicks it out. The bolt contains two springs - the extractor and ejector spring. Reinstall the buffer and spring, cycle the charging handle a few times, and you should hear and feel a difference. Clean the spring and inside of the tube, then lube the spring. Remove the spring by pressing the buffer detent - at the front of the extension tube on the bottom - down and pulling the buffer and spring forward. If you hear/feel a gritty action from the buffer spring, it needs lubing. The buffer spring is a large friction surface and needs to be lubed. Unless you’re fine-tuning an AR for a specific application and ammo, Mil-Spec is the way to go. They create a lot of friction and wear in the extension tube. I also don’t like springs made from flat wire. These springs often increase the spring pressure, making it difficult to cycle the action efficiently. There are other options out there, such as “universal” springs that use one length spring for fixed and adjustable stocks. (Buffer springs can vary up to about a half-inch in length.) For a “ fighting” AR - self-defense, law enforcement or field use - I prefer standard Mil-Spec springs, which are made from round wire. The carbine spring, for ARs with adjustable stocks, is shorter, at about 11 ¼ inches long. The spring for fixed stocks is around 12½ inches in length. There are two basic “ buffer” or action springs. For this discussion, we’re going to focus on the springs related to three important areas: the buffer assembly, the bolt and the trigger group. Choosing the right springs ensures reliability for your AR rifle or carbine. There are a lot of options out there, and not all springs are created equally. Springs are important, but often overlooked, parts for the AR. Three springs in the trigger group - trigger, hammer and disconnector - require care.Extractor and ejector springs in the bolt group need to be maintained.The “buffer” or action spring has a large surface area which needs lubrication.Proper care and ensuring functionality of those go a long way in ensuring reliability.Springs in the buffer assembly, bolt group and trigger group are important to maintain.One of the more overlooked components of the AR-15, properly functioning AR springs are vital to the platform’s performance. ![]()
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