The AGM L96 uses APS2 diameter cylinder parts but have 45 degree catch. Check out this forum, its by Shredder (the guy who made the SCS/PCS).
http://shredderscs.proboards.com/index.cgi?board=personalreviewonagml96&action=display&thread=36
http://shredderscs.proboards.com/index.cgi?board=personalreviewonagml96&action=display&thread=36