Why is 9mm the only AR chambering where solid buffers are commonly used? Do a search in YouTube for videos to see bolt bounce in a gas operated 5.56mm AR. The internal weights slam forward a fraction of a second later, helping to cancel out the bounce.īolt bounce affects practically all AR platform chamberings, gas operated and blowback. In a 9mm blowback, this may cause an out-of-battery (OOB) discharge of the cartridge (very bad!).Ī buffer with sliding weights inside acts like a deadblow hammer. If bolt bounce is combined with fully automatic fire, fast triggers, or simply a very quick trigger finger, the hammer may strike the firing pin just as the bolt bounces backwards. The bounce happens too fast for the naked eye to see. The bolt then slides forward again under recoil spring pressure. Why do they have sliding weights inside the buffer?īolt bounce happens when, after firing a round, the bolt returns to battery and literally “bounces” off of the chamber face, partially extracting the chambered cartridge in the process. Disassembled AR buffer with internal weights, rubber cushion disks, and polymer bumper cap. buffers with an aluminum body and 3 internal sliding steel weights have been used in the 5.56mm AR carbine since early in it’s history. Since the 9mm AR is a modification of the 5.56mm AR, let’s start there.ģ oz. buffer are almost universally a good selection. If that’s still too much TL DR, a Wilson Combat flatwire carbine spring and a KAK Industries gold top 8.4oz. The accuracy of this information is not guaranteed or warranted.Ĭlick here to skip the TL DR history and details and go to the buffer selector. Do not perform any action based on any of the following information. This information is intended solely for entertainment purposes only. NOTE: None of this applies to the CMMG Banshee. The right adjustable 9mm buffer can really make your day.Let’s look at a little quick history and then get to what works best for most typical 9mm ARs. When you start with a top-notch, Odin Works AR-15 9mm adjustable buffer, you are able to fit your weapon to the load you're running. Most of the time, the issue is the weight of the buffer you have installed. The problem is not your gun or the cartridge. Have you ever tried out a different weight of bullet and be disappointed that it won't run in your set-up? Well, guess what it will. An Odin Works adjustable 9mm buffer will let you tune your AR into the action. Don't buy a box full of buffers when you only need one, the right one. Short-strokes and failures to feed are typical of running the wrong weight buffer in your gun. Or, you can just get an Odin Works AR-15 9mm adjustable buffer system and quickly nail down the right combination. You can buy a drawer full of different buffers and hope to find the right one. Just how heavy, now that's another question. Surprisingly enough, a 9mm AR-15 needs a heavy buffer in order to run right. Especially with the 9mm AR-15, it's very important to run an adjustable 9mm buffer if you want to enjoy yourself. Many shooters wind up with a gun that won't reliably cycle, and much of the time it's all because of the buffer they have. Unfortunately, it can be hard to make that little 9mm behave. The action makes it a blast in three-gun competition. You have fairly cheap ammo that's light to carry. There are a lot of good things about shooting a 9mm AR-15. 9mm AR platform with carbine length buffer tube.Buffer Weight: Aluminum, Stainless Steel, Tungsten.Adjustable buffer system allows quickly nail down the right combination.Allow multiple possibilities of weight combinations.For use in 9mm PCCs (Pistol-Caliber Carbines).
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