The OSA Journal

This Glock G19 started its life as a Gen 4 G23 chambered in 40 S&W. Due to the overwhelming statistics and data showing how 9mm is a much better caliber then 40 S&W in so many ways, a complete overhaul was done to this firearm to change it to what it is today. The G23 frame was sent to our f …

One of our first AR15 builds, is our personal 10.5" AR15 build that was inspired by the infamous CQBR MK18 but with a more modern look featuring an ambidextrous Lower Receiver and several Forward Controls Design parts and some other updated features. There is a strong affinity for the MK18 due …

This 12.5" AR Pistol build was inspired by the old school look of the iconic MK18 Mod 0 with Front Sight Bases (FSBs) of the early GWOT era. To start things off, a complete BCM Lower receiver was sourced and built using all BCM parts minus the HRF RCM flared magwell and SB Tactical SBA4. The upper r …

Is it possible to have one AR15 that fits every scenario? This has been a hot topic of discussion lately, the "Do it All " rifle that can be used in everything from CQB applications to mid to long range scenarios. The fact of the matter is that no ONE rifle will be able to work in every single situa …