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 Post subject: SIG 556 lower disassemble/ reassemble
PostPosted: Sun Mar 21, 2010 5:15 pm 

Joined: Wed Nov 18, 2009 5:49 pm
Posts: 6
Is there a photo tutorial on the Sig 556 lower FCG disassemble and reassemble....the armourer's manual is not real user friendly..... I'm about to Duracoat mine and I need to take it apart


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PostPosted: Sun Mar 21, 2010 6:44 pm 

Joined: Sun Mar 01, 2009 11:18 pm
Posts: 284
Location: Minneapolis, MN
I don't have photos, but the process is pretty easy. A detailed description is on page 109 of the armorers manual, but as you said is a bit hard to follow. Here's a simplification:

1. Punch out the roll pin on the safety lever on the right side of the receiver.
2. Remove the safety shaft out the left side of the receiver
3. Remove the locking spring (AKA safety spring).
4. Pinch the trigger assembly together with your left hand, front to back, to relieve the tension and make it easier to remove.
5. Drift the trigger pivot pin out the left side of the receiver.
6. Lift the trigger assembly out, and reinsert the trigger pivot pin back into it while still pinching it together.
7. Grasp the hammer and main spring with the left hand and apply pressure forward and downward to relieve the tension on the hammer pivot pin.
8. Drift the hammer pivot pin out the left side of the receiver.
9. Slowly release the tension on the main spring and remove the hammer and main spring out of the receiver.

That's pretty much it. Take some digital pictures of how everything fits together properly at each step to assist during reassembly.

Hope this helps...

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PostPosted: Mon Mar 22, 2010 5:37 am 

Joined: Wed Nov 18, 2009 5:49 pm
Posts: 6
jalso wrote:
I don't have photos, but the process is pretty easy. A detailed description is on page 109 of the armorers manual, but as you said is a bit hard to follow. Here's a simplification:

1. Punch out the roll pin on the safety lever on the right side of the receiver.
2. Remove the safety shaft out the left side of the receiver
3. Remove the locking spring (AKA safety spring).
4. Pinch the trigger assembly together with your left hand, front to back, to relieve the tension and make it easier to remove.
5. Drift the trigger pivot pin out the left side of the receiver.
6. Lift the trigger assembly out, and reinsert the trigger pivot pin back into it while still pinching it together.
7. Grasp the hammer and main spring with the left hand and apply pressure forward and downward to relieve the tension on the hammer pivot pin.
8. Drift the hammer pivot pin out the left side of the receiver.
9. Slowly release the tension on the main spring and remove the hammer and main spring out of the receiver.

That's pretty much it. Take some digital pictures of how everything fits together properly at each step to assist during reassembly.

Hope this helps...


Thanks...I appreciate it...


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PostPosted: Sat Mar 27, 2010 9:29 am 

Joined: Wed Nov 18, 2009 5:49 pm
Posts: 6
Actually real easy to do.......thanks


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PostPosted: Sat Mar 27, 2010 11:04 am 

Joined: Sat Feb 27, 2010 10:27 am
Posts: 17
For a more visual approach:

http://www.youtube.com/watch?v=vZQFQYkKPCY

This really helped me!


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PostPosted: Sat Mar 27, 2010 12:55 pm 

Joined: Sun Mar 01, 2009 11:18 pm
Posts: 284
Location: Minneapolis, MN
That video only shows a basic field strip. He wanted info on disassembling the entire lower and removing the fire control group.

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SIG Sauer GmbH is the German representative of Switzerland-based manufacturing firm Swiss Arms AG, which was spun off from Schweizerische Industrie Gesellschaft (SIG) in 2000. SIG Sauer Inc was established in 1985 with the name SIGARMS (until October 2007) to import and distribute SIG firearms into the United States, although it now also has some manufacturing capabilities. Since 2000 it has been a separate entity. The origins of the original SIG company lies in the Swiss Wagon Factory created in 1853 by Friedrich Peyer im Hof, Heinrich Moser and Conrad Neher. After winning a competition put on by Switzerland's Federal Ministry of Defense, a contract to produce 30,000 muskets was awarded. They changed their name to Schweizerische Industrie Gesellschaft (SIG), German for "Swiss Industrial Company". In the 1970s, SIG began work on designing a handgun that would balance price with quality. Swiss law limits the ability of Swiss companies to manufacture arms and Swiss companies who wish to do this have to do so by using a foreign partner. In the case of SIG they chose the German firm of Sauer & Sohn. The SIG Sauer line of handguns began in 1975 with the SIG Sauer SIG P220. Prior to World War II, Sauer had been primarily a maker of shotguns and hunting rifles. During the war, they produced a handgun, the Sauer 38H, but afterwards had retreated from this market. With SIG as their partner/owner, Sauer returned to the business of manufacturing handguns. SIG also produced a machine gun, the MG 710 which was a general purpose machine gun chambered in 7.62x51mm NATO and based on the German MG42. It also used roller-delayed blowback as used in the CETME/G3/SIG 510 rifles and sometimes had a muzzle capable of launching rifle grenades. However, the MG 710 had a high price so the weapon was only exported to Bolivia.In 1985, SIGARMS Inc. was created as the American branch of SIG in Tysons Corner, Virginia to import the P220 and P230. In 1987 SIGARMS moved to Herndon, Virginia, and in 1990 moved to Exeter, New Hampshire to accommodate new manufacturing. SIGARMS, and its European sister companies, Sauer & Sohn, Blaser, Mauser Jagdwaffen GmbH and Swiss Arms were bought by Michael L√ľke and Thomas Ortmeier in October, 2000. On October 1, 2007 SIGARMS officially changed their name to SIG Sauer Inc. Today, SIG Sauer is the largest of the five companies and one of the largest firearms manufacturing entities in the world. It is also the fastest growing firearms maker in the United States, expanding its operations and increasing sales nearly 50% since 2005.[citation needed] SIG Sauer has recently tripled its work force and invested eighteen million dollars into state-of-the-art manufacturing facilities and equipment. According to SIG Sauer, one-third of U.S. police use SIG firearms. In the U.S. SIG Sauer also operates a firearms training school, the SIG Sauer Academy, in Epping, New Hampshire.Hunting is a sport which a human 'hunts' any living thing, but usually wildlife for food, recreation, or trade. In present-day use, the term refers to lawful hunting, as distinguished from poaching, which is the killing, trapping or capture of the hunted species contrary to applicable law. The species which are hunted are referred to as game, and are usually mammals and migratory or non-migratory gamebirds.A shooting sport is a competitive sport involving tests of proficiency (accuracy and speed) using various types of guns such as firearms and airguns (see archery for more information on shooting sports that make use of bows and arrows). Hunting is also a shooting sport, and indeed shooting live pigeons was an Olympic event (albeit only once, in 1900). The shooting sports are categorized by the type of firearm or target used.