AR15 Master Build Course

Class Overview



This Course is tailored for those who want to learn to Properly Inspect, Gauge, Modify, Build, and Test an AR15. Students will build their "Box of AR15 Parts" into a reliable AR15 under Gunsmiths supervision. YOU will bring your OWN AR15 components, and YOU will build the gun. I will watch and teach you.


Unlike some AR Schools, we DO NOT require Students to take our other Class Offerings, to attend more advanced courses like this one.


If you don't have a "Box of Parts" but have an ASSEMBLED AR15, you can bring an assembled AR and I will tear it down before class so you can reassemble it to proper specifications. Remember, just because your AR is put together, it does not mean it is put together and tuned properly.


Students who are interested in attending will be required to send me a detailed list of the components they have and a photographs of the components. I will need details on what parts are new and/or used. All components brought to the class MUST be approved by me first.

NOTE: N.F.A/Class 3/Title II Builds are permitted ONLY with an APPROVED Tax Stamp.


No tools are required. I provide ALL of them. You may bring your own tools and gauges if you would like to use them.




Class is for 5.56/.223, 9mm Luger, 6.5 Grendel, 6.8 SPC, 7.62x39, .300 Blackout, and .308/7.62 NATO Caliber AR's ONLY


What Procedures and Gauging are performed on an AR that is Built in a School of the American Rifle AR Build Class?

-All components will be Inspected/Blueprinted/Assembled/Torqued to "Match" & Self-Defense" Standards

-Measure rested and solid height Action Spring Length

-Inspect/Correct Buffer Roll Pin Protrusion

-Gauge Firing Pin Protrusion with Digital Depth/Anvil Gauge GO/NO-GO

-Gauge Firing Pin Bore in Bolt GO/NO-GO

-Inspect/Test Firing Pin Tip and Straighness

-Inspect Firing Pin Retaining Pin

-Gauge Lower Receiver Hammer & Trigger Pin Bores in the Lower Receiver with U.S. Government Gage GO/NO-GO Gage

-Gauge Upper & Lower Receiver Pivot Pin Bores & Takedown Pin Rear Lug Bore with U.S. Government GO/NO-GO Gage

-USGI Safety Bore Gauge

-Inspect Extractor Assembly

-Extractor Recess Gauge

-Inspect Cam Pin

-Inspect Bolt and Carrier

-Inspect/Test Gas Rings

-Gauge Ejector Spring #

-Bevel Ejector

-Gauge Trigger Pull

-Inspect/Test Fire Control Group & Safety Function

-Gauge Lower Receiver Front and Rear Lug Recess GO/NO-GO

-Inspect Lower Receiver F.C.G. Pocket and Side Walls

-Gauge Upper and Lower Receiver Gap GO/NO-GO

-Gauge Magazine Lips GO/NO-GO (If Applicable)

-Gauge Lower Receiver Magazine Well with U.S. Government Gauge GO/NO-GO (Applies to Standard AR15 Lowers ONLY)

-Gauge Gas Key for Straightness GO/NO-GO

-Gauge Gas Key Bore with GO/NO-GO Gauge

-Inspect Gas Key Staking and Check Fastener Torque with IN# Torque Wrench

-Gauge Gas Tube Flange GO/NO-GO

-Gauge Gas Tube & Gas Key for Obstructions GO/NO-GO

-Inspect Gas Key & Gas Tube Interface and Alignment

-Inspect/Match/Polish Feed Ramps

-Inspect B.C.G. Parts for proper De-Magnetization

-Lap Upper Receiver Face (If Applicable)

-Bed Barrel into Upper Receiver

-Gauge Upper Receiver Bore/Charging Handle Raceway

-Gauge Headspace GO/NO-GO/FIELD

-USGI Bore Straightness Gauge

-Inspect Crown

-Inspect Carrier Travel and check for Gas Key Impacts on Lower Receiver

-Gauge .500-28 for Concentric Threads with Schuster Gauge

-Gauge Sound Suppressor/Muzzle Device Alignment GO/NO-GO (YES, Bring your Silencer/Suppressor)

-Gauge Bore Straightness GO/NO-GO

-Gauge Muzzle Erosion (If Applicable)

-Gauge Throat Erosion (If Applicable)

-Gauge Throat for .223 or 5.56 Specifications (If Applicable)

-Gauge Lower Receiver Pivot and Takedown Bores GO/NO-GO

-Inspect Barrel and Gas Port with Bore Scope

-Gauge Gas Port Size with Pin Gauge Set

-Use Hawkeye Bore Scope on Laptop to inspect Bolt Carrier Bore & Barrel

-Install & Align Gas Block/F.S.B. with Hawkeye Bore Scope and Laptop

-If Applicable Gas Block Dowel Pinned/ F.S.B. Taper Pinned (SLR, BCM, and Geissele ONLY for Pinning)

NOTE: SLR Adjustable Gas Blocks Preferred

-Time/Clock Muzzle Device (This Course DOES permit Muzzle Device Pinning & Welding but they must be pre-approved

-Stake Castle Nut (If Applicable)

-Inspect B.C.G. Travel

-Gauge Flat-Top Receiver & Free Float Rail Plane  with Surface Gauge (Optics/Sights Removed)

-Optics and Iron Sights will be laser leveled and laser bore sighted/collimated.


And more...



Course Details & Requirements

Course Size: 1-4


Course Length: 8-12 Hours (sometimes LONGER) 

8 A.M. to 8 P.M.


Location: Elkton, Maryland


Lunch and Beverages are provided (You may bring your own food and beverages)

       Pizza (Lunchtime Only)

       Bottled Water

       Sweet Tea

       Un-Sweetened Tea

       Coffee, Sugar, Half & Half, and Sweet Cream
       Hot Tea


Instruction Language: English Only


Wheelchair Accessible: Yes


Hearing Impaired Capable: We are not equipped to meet the needs for those with hearing impairments at the moment. If a hearing impaired student gives notice, I will attempt to seat them at the front.


A safety brief is conducted at the beginning of the course and muzzle awareness and trigger finger safety is strictly monitored at all times. When checking in, each student AR15 will cleared by an Instructor and dry fired with the muzzle pointed into a sand bucket.


There will be no Live Fire Testing at any time during the course. No live ammunition is allowed.


There will be 1 Student per Bench and the seating arrangements will be setup in a manner that barrels are not pointing at other students. Chamber flags will be utilized at all times, except when not possible for testing and gauging. If you are attending with a family member or acquaintance please notify me and I will be glad to pair you with them.


There will be loud noises during some parts of the course. There will be Air Compressor and Hammers being used. If you are noise sensitive I suggest bringing Electronic Hearing Protection.


This course is a safety oriented but relaxed environment. The course is meant to be a fun and enjoyable learning experience with likeminded people. Your AR15 will be gauged and assembled during the course. It is possible that you will find a problem or something or something will fail a gauge test. If this occurs don’t worry, take a deep breath, relax, clear your mind, and then get back into the task at hand. The purpose of the course is not to show you how "junky" your AR15 is. The purpose is to teach you how to build and gauge it properly. You are free to bring your own spare parts or, if available you can purchase parts on site with a Check or Cash if you wish to repair any problem during the course that you may encounter. 


NO live ammunition is permitted! If you bring LIVE ammunition in the course you will be asked to leave. NO REFUNDS!


NO Pets are permitted! (Service Dogs are permitted, but they MUST behave)


NO audio or video recording devices are permitted without my permission. If you attempt to record and video or audio without permission, you will be asked to leave. NO REFUNDS!


NO cell or smart phone use allowed! You can bring a cell/smart phone to and inside of the course but it MUST be on silent/vibrate. I will NOT allow usage of cell/smart phones or texting during course. We will have periodic class breaks and phone usage is welcome during that time. If you have something important to use your cell/smart phone for during course you can go outside to text, email, instant message, skype, facetime, video chat, talk and the like. I WILL NOT permit phones to be out in the open during course.  


The student understands that ALL materials and information is protected and copyrighted. The student agrees to not duplicate or copy ANY information provided in the class or reproduce the material for their own classes and/or instruction. 


There are NO REFUNDS if you have an emergency and must leave course. Under LIMITED circumstances, I may waive fees to attend a future course. This is handled on a case by case basis and there are NO GUARANTEES.


There will be no discussions about how to violate firearm laws. 


There will be no trash talk of Internet Forums, Instructors, Gun Shops, Armorers, or Gunsmiths. That is NOT the purpose of the course. We are here to show you “A” way to do things that was developed through professional Gunsmith experience with the AR15.  I encourage all of my students and prospective students to take other courses if they have the time and funds. As an Instructor and Gunsmith, I never stop learning and I encourage others to do the same.


This course is conducted in a single room so please be mindful of your personal hygiene. I urge everyone to shower in the morning before attending and wear comfortable and freshly laundered clothing. Please use deodorant, brush your teeth, and if you wear cologne or body spray please don’t overdo it. Students must keep their shirt and shoes on at all times. 


All students MUST pay in FULL after registration. Registration requires students to complete the Electronic Enrollment Form. Students must also print and submit a Waiver to attend this course. You must present a valid identification when checking in for course. You CAN NOT attend this course if you are prohibited by any Federal or State Laws to possess a firearm, this includes mentally disqualified individuals. If you are under indictment for ANY crime that would prohibit firearm possession then you are NOT PERMITTED to attend. There will be Law Enforcement in attendance.


This class is a friendly environment and there are no "dumb questions". Please dont feel  intimidated.



This course is for Educational Purposes ONLY and does not grant certify anyone to be an Armorer or Gunsmith. 




Mandatory Materials that Students MUST Provide for the AR15 Build Course

-Pre-Approved box of AR15 Parts that can be assembled into ONE AR15 or ONE Direct Impingement AR15 that will be disassembled and rebuilt.

NOTE: If you have a HOME MADE AR15 you MAY bring it if was manufactured and is possessed LEGALLY

-A GOOD NIGHT of sleep and an open mind.

-NO AMMUNITION in Magazines, in the Firearm, in the Case, or on your person.

-Case to Transport your AR15 from the Classroom to your Vehicle

-One AR15 Magazine (Maximum of 8)


Optional Materials that Students MAY provide for the AR15 101 ARmorers Course:

-Non Alcoholic Beverages and Snacks


-Cordless Drill
-Gunsmith Screwdriver Set

-Silencer/Sound Suppressor, please bring it so you can check it with the Class Suppressor Gauge. (Optional)


-Digital or Dial Caliper

-Seat Cushion

-K-Cup Pods (For you OWN use)


These are the Items that School of the American Rifle provides for EACH Bench:

NOTE: You are NOT permitted to take these items home with you.

-Passwords for SOTAR Files/Manuals/Animation Software

-Emergency ONLY Medical Supplies (Boo-Boo Kit, Eye Wash Kit, Burn Kit, Bleeder Kit, Splint, Airway Kit)

-3 Shelf Rolling Cart for Student Owned Parts, Tools, and Supplies

-Wood Top Workbench

-Metal Stool (Adjustable Height) and/or Folding Chair

-4” Yost Vise with Anvil

-Vise Pads

-Bench Block

-Obsidian Arms Punch and Roll Pin Holder Set (Color Coded)

-Little Crow Gunworks Bolt Catch Installation Punches (Color Coded)

-AR15 Magazine Catch Tool

-Brass and Steel Punches

-4 Ounce Ball Peen Hammer

-Bolt Vise (Removing and Installing AR15 Ejectors)

-Wheeler FAT Wrench (Inch Pound Torque Wrench)

-Allen Sets (Metric, SAE and Torx)

-Tape Measure

-2 Pens 

-1 Pencil 

-Paper Towels

-Padded Work Mat 

-Magnifying Glass 

-Weed Eater Line (Gas Tube & Gas Key Gauge)

-Washer (Checks for Magnetic Parts) 

-2 Chamber Flags 

-Finger Cot 

-2 Black Dunny Rounds

-Mini Flashlight

-10 EMPTY 5.56 Casings 

-1 Parts Bin 

-Pivot Detent Install Tool

-2 Bore Cleaning Patches 

-4 Cotton Swabs 

-33MS/Aeroshell Grease (Assembly)

-Synthetic Bearing Grease (Assembly/Lubrication)

-Oil (Assembly/Lubrication)

-Rocksett (Heat Resistant Thread Locker)

-Kroil Oil (Stuck/Seized Parts)

-Cold Blue (Steel Touchup)

-Aluma Black (Aluminum Touchup)

-Nyogel (Electric Contact Grease)

-Rubber Gloves (Medium, Large, and XL)

-Name Tag (Adhesive)

-Automatic Center Punch

-Slave Pins

-G.I. Multipurpose Brush

-Lens Wipes (Optics)

-SAE Allen Bit Set

-Front Sight Tool


A countless variety of Armorers Tools and Gauges are provided for the Build Class but are shared among students. The tools and gauges are on a Rolling Tool Cart. You can be view our Tool and Gauge Inventory on our INSTAGRAM Account. 








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