Eyewall Industries have developed simple but useful device they called the STOKBLOK. What is does is prevent an M4-style adjustable stock from extending further than a desired distance and so preventing accidentally extending is to far when under stress. It seems like a very good idea for anyone who is forced to store their AR-15 with the stock collapsed.

    Brownells are selling the STOKBLOK for $10.

    UPDATE: The STOKBLOK is also compatible with the new Colt Superstoc. Eyewall Industries asked me to mention that the STOKBLOK is patent pending.

    Steve Johnson

    I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!