Angel Custom PSS2 Mega-Up APS / Type96 Power Up Spring - SP190 (520~600 FPS)

Features: Oil Tempered with high pressure treatment Progressive design, or "Irregular pitch", minimizes spring resistance making it easier to pull the bolt back Constructed out of 1st class carbon steel piano wire Long lasting durability and high performance output Spring Type: SP190 Irregular (Progressive) Spring Velocity: 520~600 FPS (velocity will vary depending on modifications done to rifle, manufacturer of rifle, and internal parts used) Compatibility: For UTG, Shadow Op, MB-01 and other compatible APS / Type96 series Airsoft Spring Sniper Rifles Material: Carbon Steel piano wire Manufacturer: Angel Custom