Who we are

MARKSMAN LLC is a Firearms and Tactics Training Group located in Crossville TN. The MARKSMAN is the name you can trust for both civilian, and law enforcement firearms training and tactics. Our clients include Law Enforcement, Security Professionals, as well as recreational shooters. Our services include Handgun, Rifle, and Shotgun training for the beginner, to those with advanced training. We also conduct Federal, State and Local Law Enforcement training. Armorer and gunsmith services are available on site. MARKSMAN LLC holds a Federal Firearms License, and is a SOT 3 dealer. We are your source for firearms, and related gear, and equipment available through our online retail store.

In the classroom, and on the live fire range

Our Certified Firearms Training and Tactics Instructors bring years of real world experience and knowledge to our clients. Under the supervision of our instructor’s, clients will learn proper care and maintenance of firearms, safe handling of firearms, and how to safely secure firearms inside, and outside of the home. The focus of training is to ensure that our clients learn how to shoot properly, accurately, and effectively as they demonstrate the Fundamentals of Marksmanship. With this solid foundation in place, our novice shooters can continue their training through our Intermediate and more Advanced Courses.

For the Intermediate and Advanced shooters

You will be exposed to complex threat scenarios based off real world Lessons Learned that involve the escalation of the Use of Force Continuum to include Deadly Force.  At MARKSMAN LLC we will ensure that when in a life-threatening situation our clients will instinctively revert to the last best training they ever had.

Other services

Available for businesses, school districts and places of worship, we offer Active Shooter Training. For retired LEO we are certified to conduct H.R.218 LEOSA. TN Handgun Safety ClassOpposing Force and Role Players are also available. MARKSMAN LLC is a Veteran owned small business.

At MARKSMAN LLC, “Every Day is Training Day.”

Firearms Training and Tactics - Darren S BrickleOur Founder

Darren S. Brickle is Director of Operations. A resident of Crossville, TN since 2003.  Darren is a retired Federal Law Enforcement Officer and Army Special Operations Force Veteran. He has a very solid reputation throughout Federal, State, and Local Law Enforcement. Mr Brickle continues to maintain a very active role in the U.S. Army Special Forces community of where he served as a U.S. Army Airborne and Ranger Qualified Intelligence Analyst while serving in 3rd Bn, 1st SFG(A). He also served as Assistant Operations Sergeant in A Co. 1st Bn 19th SFG(A).


Darren successfully lobbied leadership of the Department of Energy/National Nuclear Security Administration (DOE/NNSA) for new weapons platforms and equipment. Totaling over $2 million dollars. As a Senior Federal Agent, Mr Brickle assisted in the creation of the Special Weapons Unit of the DOE/NNSA. A Para-Military organization tasked with protecting the nation’s Nuclear Weapons and Materials. Darren was part of a select team of Federal Agents who developed the Long-Range Shooting program. Incorporating advanced technologies using modern day platforms and capabilities.  As a result, this training program fulfilled the requirement of the Mission Needs Statements developed in order to bring the new capabilities in line with current Lessons Learned, and Tactics, Techniques & Procedures (TTPs) for the NNSA.


Mr Brickle was a Senior Federal Firearms Instructor in the organizations Area of Operations Eastern Command. Darren played a pivotal role in bringing NNSA Tier 1 Gold Federal Law Enforcement capabilities, and U.S. Military (DOD) Tier 1 Green, and Blue capabilities together. Thus allowing them to compete against each other. As a result, they were able to share Lessons Learned, and TTP’s during the annual United States Army Special Operations Command Sniper Competition, held at Fort Bragg NC. Darren has the drive, vision, background and experience, along with a solid reputation in the Firearms, Tactics and Training Industry.  Darren and his Staff, will ensure that our clients receive safe, relevant, and proven training.  Safety is paramount. Knowledge is the key to safety.  Our Staff are some of the best in the industry.  No matter your age or skill level, MARKSMAN LLC GUARANTEES you’ll learn to safely and competently manage your firearm, maintain proficiency, challenge your ability, and be a responsible gun owner.