Dave Markowitz
Member
I recently bought a new Century R1A1 FAL on a South African lower receiver and Century upper. After I got the gas plug out tonight I discovered that the gas piston is binding in the hole where it passes through the upper receiver.
The piston appears to be one piece and has no markings on it, so I'm not sure if it's surplus or Century-made. It doesn't appear to be visibly bent. I tried putting it through backwards (i.e., put the base in the hole from the receiver towards the muzzle) and it bind that way, too.
I'm wondering of the diameter of the piston or the hole through which is passes is off. What are the correct diameters of these parts?
I've done several searches through the forum archives. How should I fix the problem?
Also, can I replace the gas plug with the grenade launcher sight with a standard metric gas plug? The gas plug with the GL sight is a real PITA to remove.
Thanks.
The piston appears to be one piece and has no markings on it, so I'm not sure if it's surplus or Century-made. It doesn't appear to be visibly bent. I tried putting it through backwards (i.e., put the base in the hole from the receiver towards the muzzle) and it bind that way, too.
I'm wondering of the diameter of the piston or the hole through which is passes is off. What are the correct diameters of these parts?
I've done several searches through the forum archives. How should I fix the problem?
Also, can I replace the gas plug with the grenade launcher sight with a standard metric gas plug? The gas plug with the GL sight is a real PITA to remove.
Thanks.