Glock Recoil Spring Fits G17, G34 GEN4. Part number 16 on the Glock Schematic. Marked 0-2 on the rear.
RSA is still info the package so I can only comment it looks to be of top quality. As for customer service these folks at RYG are all over it. Online ordered day one and the item was in my mailbox on day 3. My only complaint is every time I order something a week later they offer free shipping! If you want tho order from RYG Just let me know, I will order something and a wee later you can order with free shipping ??. RYG is great.
Bought the recoil spring with some other parts ( springs, locking pin, extended slide release) to put in a G22 with a 9mm conversion Barrel. works like a charm, no more case ejection jamming like it was the case with the Recoil Spring that was in the G22. Got all the product shipped to Canada hassle free and as described.