Author: Jody Lewis

Jody has been involved in firearms one way or the other for the past 20+ years. Jody holds multiple professional certifications including the NRA basic firearm instructor and RO training. When he isn’t teaching or training, he writes and photographs regularly for a number of online and print publications. Jody is an NRA Member as well as a certified S&W M&P Armorer as well as a part-time 3-gun competitor. As an Amazon Associate, I earn from qualifying purchases.
Geissele Reaction Rod

Geissele Reaction Rod

Up until about a year ago, I exclusively used a Derlin action block much like the one seen here. Derlin blocks are useful but introduce other issues such as setup time, lining up pins, torque flex, etc. I often found the need to apply more than mil-spec torque to the barrel nut when installing a barrel and could visually see the upper flexing. It made be cringe but I didn’t know of any other option.