Lambda barrels are cold-hammer forged from stainless steel, which is the same process how real rifle barrels are produced. They have a superior tolerance and roundness of the inner surface compared to anything else on the market. This inner barrel is suitable for your AEG. Made of SUS304 stainless steel, the Precision 6.05mm precision barrels from PDI are very precise with high tolerances of 1/1000 mm accuracy, which beats 99% of all precision barrels on the market. These are for serious tuners who want the most out of their guns.