AGI - Products AR-15 Rifles

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AR-15 Rifles


AR-15 Rifles

Bob Dunlap completely understands the design, function, and repair of Eugene Stoners masterpiece, the AR-15 rifle. This extremely successful design, whether you love it or hate it, has been the U.S. militaries first line battle rifle longer than any other our history has. Over 40 years as of this writing. It is the second most prevalent rifle design in the world today, behind only the AK-47 and its derivatives. If you want the quick course on how to get this rifle apart, back together, and operating as intended, then this course is for you (if you want the "long course," look into our basic 108 hour Professional Gunsmith Course.)

Among the items covered are:


  • Discussion of the guns designer and the company he worked for at its origination, and its 1930s era Jungmann gas operation system
  • The AR-18 /180 as an improvement on the AR-15 and a short history
  • Gene Stoners activities post ArmaLite
  • ArmaLites activities after the sale of the design to Colt
  • Discussion of changes in the gun, post A1, including the A2 and HBARs

Design & Function

  • Explanation and demonstration of the parts and operation of the direct impingement gas system
  • Where the gas comes from, where it goes, and what it causes the bolt carrier and bolt to do, and why
  • Explanation and demonstration of the operation of the primary and secondary sears (disconnect) and the hammer cycle
  • Explanation of the buffer assembly, what it does and how it does it. Why the various sizes, weights and constructions are important in full auto fire, but of little importance in semi-auto mode
  • Operation and purpose of the ejection port cover and the bolt stop are demonstrated
  • Bob shows the forward assist and how it works, and gives his considered opinion on how its purpose should have been accomplished


  • Extensive disassembly shown and explained, including front sight and gas tube. Parts not removed have removal described, including barrel
  • Special tools needed are shown and their function explained
  • Why you need to shoot full power loads if you shoot lead bullets or have a .22LR conversion
  • What to look for around the gas port, and how to correct misalignment of the ports in barrel and front sight
  • As usual, Bob tells you which parts, springs, and plungers are likely to launch themselves into Never-To-Be-Seen-Again-Land, and how to avoid that happening
  • Common problem areas to watch out for, what parts give trouble, and which do not

Cleaning & Lubrication

  • AGI cleaning & lubrication methods shown, along with the reasons for their use


  • Making sure, you have no parts left over, and help for the problem of those springs that all look alike! Where do they go?
  • Extractor requirements explained and solutions to extraction problems shown
  • Firing pin specs given, both Bobs preferences and the militarys. Why they are different, and both are correct for their intended uses
  • Making sure the gas system gets in line

Tuning Tips

  • What you need to know about the ejector
  • Ditto with the extractor, and corrections
  • Barrel is removed and put back on in the process of showing how to modify the frame and barrel extension to correct Low Feeding
  • How the rounds need to sit in the magazine to feed properly, and what to do to the magazine if they do not


  • What to use
  • What to avoid and why
  • .22LR conversion unit
  • Spare parts to keep on hand

Tuning Tips Redux

  • Why the gun fires on trigger release, and what to do to correct it if it does. Also known as, "staying out of jail"
  • Why gas port diameter is more critical in carbines (shortys) than in rifles, and how to correct the short cycling that may occur with certain loads in a carbine
  • A cause of short cycling commonly expressed in the Blogosphere and in magazine articles that, in Bobs experience, is not a problem
  • Correcting bolt/receiver/bore misalignments

Shooting the AR

  • AR-15 Semi-Auto
  • CAR-15 Semi-Auto
  • CAR-15 Full Auto
  • CAR-15 .22LR conversion Full Auto


If you noticed how often the terms "explanation" and "visual demonstration" are used, you may be getting some idea of why this course is a must have for any AR series auto-loading rifle owner, or someone who intends to be.

How much does your Professional Course cost? The answer can be found in our intro pack. We recommend to anyone considering our Professional Course that they get the Introduction to Gunsmithing Packet as this packet includes a video with a sample gunsmithing lesson. It also includes an Enrollment Form that lists the costs of each Course level available as well as the material covered in each level.

Do I have to pay $7 s/h on each retail video? No, we discount shipping on multiple video orders. The new website calculates shipping based on weight and destination. In most cases, the actual shipping is less than listed in the catalog.

Is there a time limit to complete your course? No, our course is self-paced. As you complete sections of the course and submit your tests, we provide certification of completion for that portion of the course.

Can I become certified by taking your retail courses? Answers vary. If you are intending to purchase all the videos in our Law Enforcement Armorer's Course, for example, as long as you buy the test separately you can obtain a Certification as a Law Enforcement Armorer once you complete the testing successfully. Otherwise you would need to purchase one of our certified professional courses in order to obtain a profession Gunsmithing certificate.

What does your Professional Gunsmithing Course Introductory Lesson cover?The Introductory Lesson is one hour and includes complete information on how to get started Gunsmithing. You will also learn how to insure reliable auto-pistol feeding and how to prevent jams, checking and adjusting "range" on Smith and Wesson revolvers, how a gas system works on a Colt AR-15, AR-7 trigger repairs, timing and understanding cartridge stops of a Remington 870 and much more! 

Are your Courses guaranteed? Yes! The American Gunsmithing Institute is proud to offer a 100%, "Bulletproof Guarantee." We are so sure of the quality of our Courses and products that you may return any item purchased directly from AGI for a full refund (less shipping) for up to 90 days after purchase date. Defective DVDs and videos will be replaced for up to 1 year. The only question we will ask is: "How did we fail you?"

Does AGI offer other Certified Courses aside from the Professional Gunsmithing Course? Yes. We also offer a Certified Machine Shop Course, complete with Lathe, Mill and general Machine Shop instruction. Additionally AGI offers a Certified Welding Course and a Certified Locksmithing Course.

What do the Disassembly/Reassembly Courses cover? AGI offers D/R Courses that clearly demonstrate the complete process of disassembly and reassembly step-by-step. The Courses use close-up views to provide comprehensive instruction. Each DVD Video Manual covers one specific model or family of firearms and is indexed to help the user quickly find the information that they are looking for. At the price of only $19.97 each (plus s/h), these video manuals are must have support information for anyone who owns one of these firearms.  

What do the Armorer's Courses cover?AGI's Armorer's Courses teach you how to disassemble, maintain, repair and reassemble your choice of the 51 guns featured. These videos are packed with exclusive information and are equal to a complete Factory Armorer's Course! While our Disassembly/Reassembly Courses contain invaluable information, our Armorer's Courses contain so much more. Master Gunsmith and AGI Instructor Robert "Bob" Dunlap explains design and function using exclusive factory cutaway firearm models, giving you close-up details of the internal functions you would not otherwise be able to see. All AGI Armorer's Course DVDs include a FREE printable schematic!    

Are your Instructors experienced in their fields? Absolutely. Master Gunsmith and AGI Senior Instructor Robert "Bob" Dunlap is a widely respected authority in the firearm industry and spent over 35 years as the senior instructor at Lassen College's internationally known Gunsmithing School. Master Gunsmith Gene Shuey is a world class custom gun builder, former world class competitive shooter and current trainer specializing in 1911 and Glock pistols, IPSC limited and open class guns, and high-end custom rifles. Darrell Holland is a well known custom rifle builder, writer and lecturer who is always inventing new performance shooting products. Ken Brooks is a graduate of the renowned Gunsmithing program at Lassen College and continues his journey by working full time for Bob Dunlap. Gene Kelly is the President of AGI and the Gun Club of America. He graduated from Lassen College's Gunsmithing program and worked as a Professional Gunsmith prior to founding AGI. T.R. Graham is a NRA Certified Pistol Instructor and is a known authority, author and Gunsmith specializing in Glocks and other handguns. Master Armorer John Bush is an AGI Instructor and a consultant to manufacturers and importers of military firearms, and is certified as an Expert Witness in firearm cases.

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