9mm for L96 and other APS based rifles. Warrior, Well, Mauser & Maruzen L86, MB-01, MB-04, MB-05 & MB-08.
fps outbput approx 550-570 fps with 0.2g bbs.
VERY powerful. You must ugrade your cylinder if you intend to use this spring.
When upgrading your rifle we always recommend having a read through our guide: http://www.airsoftsniperparts.com/upgrad ing-an-l96
APS L96 M170 Spring