It is not a good choice for FCC. The spring with the m120 cylinder fits
07/04/2022
Frederik R.
Perfecto
Perfect for feeding problems with full mags.
06/28/2020
Ramon T.
Todo perfecto y rápido en la entrega. Gracias y hasta pronto
05/13/2019
Eric C.
systema ptw
merci pour la réparation de ma réplique. les conseilles, astuces, on etaient tres utiles, depuis qu 'elle est passé dans votre atelier, la porté a augmenté, et la precision aussi merci
04/12/2018
Alistar F.
ok
Try to use this when you have feed problems, possibly solving your problems and having a good compulsion
10/02/2015
Gerrit R.
Missfeeding Issue
After installing this spring i can finally put 100-110 bb's in my mags without feeding issue's, with the basic systema spring i only could put 70 bb's in. Perfect Product
10/02/2015
Gerrit R.
Missfeeding
After replacing to this spring my missfeeding issues are over when i put more than 70bbs in my magazine, can put 100 in there without issue. Super product