AGI - Products Colt Single Action Revolvers

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Colt Single Action Revolvers


Join Master Gunsmith Bob Dunlap as he gives you the benefit of his expertise and experience again, this time with the ubiquitous Colt Model P of 1873, the World Famous Single Action Army. This is of course the gun all of our western heroes of screen, radio (for those of you old enough), and TV made famous in their Oat Operas. Everything you need to know about getting your gun apart and back together with no left over parts.

Among the items covered are:


  • How long has the gun been produced
  • When was the gun redesigned
  • What the difference is between: the old style black powder base pin stop, and the modern smokeless powder base pin stop
  • The old and new style Ejector Rod buttons
  • Old and new style hand
  • Colt and the European copies

Design and Function

  • Bob uses two different cut-a ways to show you the cocking cycle
  • What does the hand do, and how does it do it
  • What is the proper sequence for the hand and bolt to work together
  • What is "Over Cock?"
  • What causes the cylinder to time up correctly for loading and ejection
  • Safetys on the Colt, U.S. Arms, Uberti, and Armi San Marcos.


  • One and two piece grips discussed
  • Grip frame and mainspring removed
  • Function of the Black Powder frame base pin screw shown
  • Cylinder removed
  • Interaction of bolt and hammer cam shown in place
  • Removal of trigger/bolt spring, trigger, and bolt shown
  • Hammer removal shown and order of disassembly discussed
  • Interaction of bolt and hammer cam shown out of gun
  • Loading gate removal shown
  • Function of the plunger demonstrated, and correction of floppy gate
  • Removal and disassembly of the ejector shown

Cleaning & Lubrication

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


  • Making sure you have no parts left over

Common Problems and Their Solution

  • Proper cylinder timing and three types of hands discussed
  • Correct functioning of the first and second steps of the hand discussed
  • Correcting hand length (stretching) shown and necessity and method of heat treating explained
  • What is Transitional Bind, and how do you correct it
  • For competition guns (Cowboy Action or Quick Draw), do you want your gun timed slightly slow or fast
  • In what order (trigger pull, hand timing, and bolt timing) should you make your corrections
  • The Trigger job explained and shown
  • What are Positive, Neutral, and Negative trigger systems, and why you want one and not the others
  • What is a modified Colt trigger system and how it saves your seat tip and hammer notches
  • Should you modify the Bolt/Trigger return spring to reduce the trigger pull weight
  • Why are the newer springs legs separated all the way to the screw hole
  • What is the proper travel for the bolt
  • Proper angles for the sides of the bolt, and fitment in frame slot and cylinder notch
  • Modifying the bolt leg to correct timing
  • What is the minimum acceptable depth of bolt/notch engagement
  • How to contour the top of the bolt to stop throw-by
  • Special bolt top contour for maximum speed of engagement for speed shooting
  • How to increase depth of engagement
  • Recontouring the base of the bolt to reduce spring stress and breakage
  • Recontouring the hammer spring to reduce cocking effort
  • Cylinder end shake, what is it and how do you get rid of it.
  • How the one piece grip fits
  • Detail of the Uberti safety system

If you noticed how often the terms "explanation," "demonstration," "what," and "how to correct" and are used, you may be getting some idea of why this course is necessary for any owner of the Colt Single Action Army Revolver or its clones.

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.