Same mainspring that originally came with the gun in full power 20J.
WEIHRAUCH mainspring high power (20J) for HW77 / HW97K.
conforme, fait son job impec
livré avec une graisse de protection tres fine et tres collante, bonnes performances
Excellent
Quality original product.For best results,use with a Delrin top hat and rear spring guide.
ressort et piston
livraison rapide \ntraitement de la commande parfaite \nartisan serieux à recommander.
Hope it will do it's job
Purchased for the exchange in the future. Measured, seems to be exact what I hoped.