![]() With an adjustable gas block, you can fine-tune the amount of gas that is bled off of the rifle into the gas tube and the amount of gas that is expelled as excess from the rifle. Install an Adjustable Gas BlockĪgain, it all comes down to gas pressure. Pairing a suppressor with the next option on the list is a really great thing to do, too, and we highly recommend it if you’re going to be shooting subsonic ammo with a suppressor. Suppressors are one of the most fun aspects of running subsonic ammo in an AR-15, and because they pair well together, using a suppressor can help mitigate some of the issues you might be having. Whereas a lighter buffer means less mass to be moved rearward, a lighter buffer spring means less compression resistance to move the bolt carrier group and buffer back for the action to cycle. This works in a similar way to the lighter buffer. In addition to lighter buffers, you can also use lighter buffer springs. Using a lighter buffer can make it easier for the bolt carrier group to push the buffer to the back. The reduced gas pressure from subsonic rounds can make it harder for your firearm to push the bolt carrier group and the buffer rearward, which is what needs to happen in order to eject the spent casing and load the next round. How to Make Subsonic Ammo Cycle in an AR-15īecause of the exceptional modularity of the AR-15, it’s really easy to swap out and switch around parts from what came in the gun from the factory to aftermarket options that play nicer with subsonic rounds. You no doubt have experienced this with different brands of ammo, different powder charges, or different bullet weights.Īll of those variables impact how the different stock parts of your AR-15 function, and not all of those parts are designed to provide peak performance with subsonic ammo. No gun comes out of the box ready to cycle any and every different load option on the market. Or, it can be seen if an action fails to cycle at all, leaving the spent case in the chamber. Evidence of not enough chamber pressure can be that your action isn’t cycling completely and is failing to fully extract the spent case or chamber the next round. Without sufficient chamber pressure, there won’t be enough force behind the gas as it goes into the gas tube to cycle the action properly. We talked about how gas pressure ensures the proper operation of the AR-15. Let’s take a look at some of the most common ones. Why Your Subsonic Ammo Isn’t Cycling in your AR-15Īs we mentioned above, there are a number of things that can lead to cycling issues with subsonic ammo in an AR-15. When you pair subsonic rounds with a suppressor, you’re getting the quietest combination possible from an AR-15. Supersonic rounds travel slower than the speed of sound, so you don’t get that loud crack. ![]() ![]() Suppressors are great at bringing down decibel levels, but they can’t do anything about the supersonic crack that is created when a bullet breaks the sound barrier. Fret not, we can fix it! Why Use Subsonic Ammo for Your AR?īut if the pairing of subsonic ammo with an AR-15 can cause cycling and reliability issues, why use it at all? So glad you asked… Sound Reduction ![]() This means that in some cases, you might find that your AR-15 either isn’t cycling properly or isn’t cycling at all with subsonic ammo – especially when paired with a suppressor. A suppressor changes how those gases interact with the gas system in the gun, and the reduced speed of subsonic ammo also impacts the gas in the system. First, let’s explain why there can be issues.Īn AR-15 uses the gases from each fired round to cycle the action on the gun and prepare it for the next round. This can lead to some complications, but they’re easy to solve. (Hollywood ruins everything.) You can, however, quiet things down even more by pairing your AR-15 with subsonic ammo. Running an AR-15 with a suppressor is a lot of fun and it’s definitely quieter than an unsurpassed AR-15, but it isn’t anything like the movies. ![]()
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