You are correct, the Gen3 full size G22/G31 recoil springs are 17 lbs. Most our customers prefer to use the 20/22 lb recoil springs.
Glock Inc has reintroduced the Gen4 recoil springs. They differ according to model & caliber, unfortunately I do not know the advertised weights at this time. You could come up with a single (combined) weight however the spring weight of the first stage is far different than that of stage two.
Last edited by JR; 07-24-2011 at 14:49..