Skip to main content

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

Parkerizing Part 1

Here is the M70 barrel after abrasive blasting. Components that can move, such as the grenade sight and handguard retainer, are repositioned several times during blasting to make sure all surfaces are prepared. Note the plug from Lauer Custom Weaponry has been inserted to block the Parkerizing fluid from entering the gas block. There are also plugs on each end of the barrel.

The parts must be immaculately clean of rust, dirt and oil. I start by soaking parts in acetone and then using brake cleaner with the tube to aggressively clean all the nooks and crannies of the rifle that I can. The idea is to remove trapped cosmolene, etc.


Next, I use my Harbor Freight 40-pound blaster to prep the surface. I do this outside with an asbestos grade filter mask, safety goggles, hood and welding gloves. I kid you not, the media goes everywhere. Some day, I may invest in a blast cabinet but I am quite happy with what I have, provided the weather is cooperating.


At this point, I clean the parts again and let them soak in acetone. Any handling of parts from this point on should be done with rubber gloves to avoid getting oil on the steel and blocking the Parkerizing.

Parkerizing

To Parkerize, I actually use a do-it-yourself formula passed to me by a couple of friends. For guys who don't want to make their own solution, Brownells sells a very good Parkerizing system that gunsmiths swear by and it provides instructions.

For the curious at heart, Parkerizing is a process by which the surface of the steel is coated with a very durable phosphate. The process I will outline creates a manganese phosphate layer whose porosity really gives the Molyresin finish a great surface to adhere to.


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

Recommended Articles

See More Recommendations

Popular Videos

M134 Mini-Gun

M134 Mini-Gun

While filming the 2018 season of Guns&AmmoTV we had the unique opportunity to fire the M134 Minigun.

Pioneer Arms PPS-43C Pistol

Pioneer Arms PPS-43C Pistol

The PPS-43 served Poland and the Russians during WWII. It is now available as a pistol for the US market.

Hornady Kestrel 5700 Ballistics Weather Meter with Hornady 4DOF

Hornady Kestrel 5700 Ballistics Weather Meter with Hornady 4DOF

The Hornady Kestrel 5700 combines complete onsite environmental measurements with Hornady 4DOF trajectory solutions.

Firearms News Reviews the S&W M&P 2.0 9mm Compact Pistol

Firearms News Reviews the S&W M&P 2.0 9mm Compact Pistol

Firearms News editor Vince DeNiro runs the Smith & Wesson M&P 2.0 9mm compact pistol through a self-defense drill.

See More Popular Videos

Trending Articles

While Germany is the Edenic home of modern sniping, they were always one step behind the Soviets during World War II, despite fielding some excellent sniper rifles.German Sniper Rifles of World War I and II Rifles

German Sniper Rifles of World War I and II

David M. Fortier - August 13, 2020

While Germany is the Edenic home of modern sniping, they were always one step behind the...

More and more people are choosing to carry a handgun for personal protection, here is why you may want to consider SIG Sauer's P365.Is SIG Sauer's P365 9mm the Perfect Carry Gun? Handguns

Is SIG Sauer's P365 9mm the Perfect Carry Gun?

David M. Fortier - August 16, 2020

More and more people are choosing to carry a handgun for personal protection, here is why you...

Governor Mike DeWine's STRONG Ohio anti-gun bill is facing strong, unified opposition.Opposition to 'STRONG Ohio' Remains Strong 2nd Amendment

Opposition to 'STRONG Ohio' Remains Strong

Buckeye Firearms Association - August 24, 2020

Governor Mike DeWine's STRONG Ohio anti-gun bill is facing strong, unified opposition.

The Mossberg 590A1 Retro offers the proven durability and reliability of the M500 and M590 models with the enhanced combat utility of a military “trench gun.” Mossberg 590A1 Retro Shotgun Review Shotguns

Mossberg 590A1 Retro Shotgun Review

Leroy Thompson - August 24, 2020

The Mossberg 590A1 Retro offers the proven durability and reliability of the M500 and M590...

See More Trending Articles

More Gunsmithing

Lone Wolf Distributors are now offering the Advantage Arms .22 Conversion Kit for Glock pistols.Lone Wolf Advantage Arms .22 Conversion Kit Gunsmithing

Lone Wolf Advantage Arms .22 Conversion Kit

SGN Online Editors - April 16, 2014

Lone Wolf Distributors are now offering the Advantage Arms .22 Conversion Kit for Glock...

AGI's Certified AR-15/M4 Riflesmith Course includes DVDs with Complete Disassembly and Reassembly,AGI AR15/M4 Riflesmith Course Gunsmithing

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...

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

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,...

This fully adjustable stock and comb for AR-15/M16/AR-Style .308 rifles readily adapts length ofBrownells AR-15/M16/AR308 PRS Buttstock Kit Gunsmithing

Brownells AR-15/M16/AR308 PRS Buttstock Kit

SGN Online Editors - September 15, 2014

This fully adjustable stock and comb for AR-15/M16/AR-Style .308 rifles readily adapts length...

See More Gunsmithing

Magazine Cover

GET THE MAGAZINE Subscribe & Save

Digital Now Included!

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW OUR CURRENT ISSUE Arrow

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

Phone Icon

Get Digital Access.

All Firearms News subscribers now have digital access to their magazine content. This means you have the option to read your magazine on most popular phones and tablets.

To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine.

Get Digital Access

Not a Subscriber?
Subscribe Now