Building a Hybrid Yugoslav M70B1 from a Stub with Screws

Building a Hybrid Yugoslav M70B1 from a Stub with Screws

George Spafford is building a replica of the Yugo M70B rifle using a stub parts kit. A new installment will appear here every Friday

Install the Fire Control Group and Internals

Spafford used a fine 3M abrasive pad to polish the back of the hammer as well as the upper and lower rails. One of the reasons AKs need to wear in is to remove the irregularities on the back surface of the hammer where the carrier rides over it. By polishing, everything is smoother from the start.

From here, you need to assemble the rifle. I recommend polishing both the upper and lower rails to remove any burrs. I also polish the back of the hammer and the surface of the hammer where the hooks grab. Note—the intent is only to polish. If you remove too much material, you can alter the geometry of the fire control group and impact functioning.

When people buy new AKs or build an AK for the first time, they complain of sticky actions where the bolt carrier seems to hang on the hammer. Most of the time, this is a matter of wearing in and lubrication. I use CLP on the FCG and dabs of wheel bearing grease on the rails, back of the hammer, sides and bottom of the bolt carrier. This makes for a very smooth action when coupled with the polishing. In all cases, AK actions tend to get smoother as they wear in, so even if you skip this step, the action will improve with time.

I install the hammer and use needle-nose pliers to locate the spring. From there, I install the trigger. Be sure the disconnector spring is installed. Failure to install it will result in inconsistent fire control group functioning.

This is the installed TAPCO G2 FCG, Falcon Arms spring set and Romanian G selector lever. It's not visible from this angle, but the Falcon FCG retaining spring was used. By using all new Falcon springs, any potential headaches caused by worn-out springs are avoided.

Popular Videos

The GPO Rangeguide 10x50

If you need to see your game, and know the distance in all hunting environments, the GPO RANGEGUIDE 10×50 is your winning ticket.

New handguns from Smith & Wesson

The Performance Center's M&P380 Shield EZ pistol features ported barrel, flat face trigger and tuned action.

Hornady's New A-Tip Line of Match Bullets

Hornady Manufacturing, has developed a new line of match bullets. The A-Tip is designed for precision and long-range shooting.

See more Popular Videos

More Gunsmithing


Rebarreling a Savage Model 11

Gus Norcross - February 04, 2014

I have long been a big fan of Savage 110 series bolt action rifles. They are an extremely good


Krebs Enhanced AK Safety

Gus Norcross - May 07, 2014

As someone accustomed to AR-15, M14 and M1 rifles, I can't say I'm a huge fan of the AK-47,...


AGI AR15/M4 Riflesmith Course

SGN Online Editors - July 06, 2014

AGI's Certified AR-15/M4 Riflesmith Course includes DVDs with Complete Disassembly and...

See More Gunsmithing

GET THE MAGAZINE Subscribe & Save

Temporary Price Reduction.


Give a Gift   |   Subscriber Services


GET THE NEWSLETTER Join the List and Never Miss a Thing.