US Army TC 3-22.9 Rifle and Carbine – Stability

Greetings all. Since this is my first blog for Primary & Secondary, let me take a second to let you know that if you are reading this you are in the right place. Primary & Secondary is one of those rare places that have real information in real time by real people. The Admins and rules keep … Read more

The Varying Quality of the AR15 and Why. Part 1

By Will Larson, Owner: Semper Paratus Arms Over the course of the last few years and most recently in the last four years since I started teaching an AR-15 centric based armorer course, I usually get asked about what separates a “Hobby type AR” over one for professional use ( i.e.- anti-social gatherings). What we need … Read more

Sentinel Concepts Practical Urban Carbine 6-11/6-12 Part Three

Sentinel Concepts Practical Urban Carbine Part 3 The vast majority of defensive and LE shootings occur in the evening and hours of darkness. The ability to take on the challenges of acquiring and engaging threats becomes exponentially more difficult for many once extra manipulations are required for light work. Steve Fisher of Sentinel Concepts feels … Read more

Magpul PMAG Gen M3

Magazine Design Philosophy, Testing, and Performance of Magpul Industries PMAG Magazines for the AR/M4/M16/HK416/M249 By Duane Liptak, Director of Product Management and Marketing, Magpul Industries. Director of Magpul Core, Magpul Industries Corp. Building feeding devices for firearms is not a new endeavor, and many materials and methods of construction have been employed for this task. … Read more

Emerson Knives: A Critical Look

Emerson Knives Inc. and the custom knives of Ernest Emerson enjoy a strong reputation in professional circles. Emerson folding knives in particular are considered by many to be the epitome of what tactical knives should be. I was an Emerson user (hard user) and fan for over a decade, beginning in 2001. I owned both … Read more