SIG 550 Gas Piston w/Spring & Gas Tube Assembly, Swiss, *Very Good to Excellent*

Original Swiss Arms, SAN, SIG 550 Rifle Gas Piston with Spring and Gas Tube Assembly, 5.56X45, in *Very Good to Excellent* condition.

Sold as a set (as pictured).
SIG 550 Rifle gas cylinder and gas piston with spring assembly manufactured in Switzerland.
Fits all SIG 550 series rifles to include the US SIG 556 rifles.
It is ready to mount onto your US SIG 556 rifle receiver after you have installed one of our longer barrels with the SIG 550 profile (barrel available separately from APEX).
These parts are necessary for you to turn your SIG 556 rifle into the ultimate SIG 550 look-alike!
Manufactured with the highest quality materials under the supervision of Swiss Production Engineers.