1/7/2024 0 Comments 9mm ar pistol buffer![]() ![]() “B.”‘s setup has a 7” barrel which results in higher bolt velocity, so it would require a little more mass than the examples above. The 5.28″ barrel select fire 9mm blowback Micro Uzi uses a bolt weighing only 408g. For example, the steel receiver, 5.25″ barrel, full-auto Cobray Mac-11/9 9mm blowback platform has a factory bolt weighing only 15.5 oz, but can also run properly with a 32 oz. This seems to be the “sweet spot” for most 9mm builds, barrel lengths, factory ammunition, and keeps bolt velocity in check.ĩmm blowback has been proven to run properly with a wide range of weights. total mass, which is what most other 9mm blowbacks use. The potential problem here is that the aluminum receiver of the AR is not designed for the bolt velocities that may result from using lighter masses. It is entirely possible for 9mm blowback to run with 18.6 oz. 308 springs can cause a host of other issues, but hey, as long as those manufacturers can make a bigger profit and sell their gun for a few dollars cheaper than their competitor, who cares, right? (sarcasm) 308 spring on there and it may stop bolt bounce simply because the spring is so resistant to compression. A lot cheaper than a proper internal-sliding-weight (deadblow) buffer. This may explain why many manufacturers are using. Yes, there is new evidence coming to light that an overly stiff spring coupled with a solid buffer may not suffer from bolt bounce. 9mm bolt, there is no bolt bounce (checked with high speed phone video) and no bulged cases. “B.” is using a 7″ barrel, rear charging, Foxtrot Mike (FM) 9mm upper. For comparison, a normal 9mm blowback buffer is 4″, a normal carbine buffer is 3.25″, and a. The SI buffer tube is only 5″ long (compared to a normal 7″ carbine buffer tube). Strike Industries short pistol buffer tube “B.”, one of my site visitors, built a 9mm simple blowback using one of the Strike Industries’ (SI) short pistol buffer tubes and their matching micro 9mm buffer/.308 flatwire spring kit. The Strike Industries short buffer tube system: The accuracy of this information is not guaranteed or warranted. Do not perform any action based on any of the following information. This information is intended solely for entertainment purposes only. How about using a really short buffer tube? Can we get away with a tube 2″ shorter than usual in a simple blowback operated 9mm? ![]()
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