- Category: Reviews
- Published on Tuesday, 21 February 2012 04:40
- Written by Administrator
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What really matters is the coefficient of friction (µ). µ defines the ratio of friction between two objects. The force required to operate the bolt on a weapon would be defined by two main forces. The tension of the hammer spring, and the static friction of the steel BCG and hammer on the receiver. Dry aluminum and and steel have a static µ of ~ 0.61. With a coat of traditional oil, this can be lowered below 0.25 so a little less than half. As carbon builds up most assume the µ climbs. This is not actually the case as carbon will lower the µ. What is actually happening is the BCG is developing a layer that is causing binding. So as you can see its not just coefficient of friction and hardness that matters. The ability of a material to avoid deposit build up is equally if not more important. Factor in heat, and corrosive compounds and you will see that a seemingly simple problem can actually be quite complex. For those reasons so many people want to fall back on empirical evidence. IE: "I saw a weapon go x,xxx rounds before having a malfunction". While empirical data can be an indicator, with only one data sample the information has little scientific value. While we will preform a long term review and post updates, we are not going to rely on it as a definitive study. Instead we will rely on the merits of the tangible data along with trying to collect data from others to form a more comprehensive conclusion. People cay they have seen Failzero groups go over a thousand rounds suppressed and full auto with no lube. Sadly I have seen mil-spec bolts do the same. It is not the norm, but it can and does happen.
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With that primer out of the way, the initial impression of the Failzero basic kit was very favorable. The entire kit comes with complete instructions that were easy to follow. Packaging was nice and shipping was very fast. In one kit we ordered there was an issue with the gas key. A quick email to customer service had it sorted out and a new BCG was on our door later that week. The EXO coating from UCT was uniform and complete. After some initial testing the entire group was very easy to clean. More so than even its polished chrome counter part. At around $200, this kit is about double that of a basic BCG, and on par with most "premium" kits. Given the quality and claims of the kit, this has the potential to be an amazing product. While I do not intend to run it completely dry, it will provide peace of mind with extended use of a suppressor. The fact it eases clean up as much as it does is reason enough for me to purchase these kits exclusively in the future. We will follow up with long term reviews as issues or praises arise. The only stem of the install that may throw some of the most basic AR users is the hammer install. Below is a quick video to walk you through.
For additional discussions on this review or to share your own experiences click here: FailZero Bolt Carrier Group Kit Reviews