Guarder Ball Bearing Spring Guide for Airsoft AEG Gearbox (Type: Version 7)

"Too big for HK UMP45 gearbox, but fit fine with the use of a dremel tool on the two prongs sticking out of the sides. Not a big deal but keep in mind it may not work in all V3 gearboxes without some modification.
Other than that, seems decently high quality and would recommend

"As tough as a rock, this spring guide is awesome. Metal spring guide with ball bearings. Mine came as a dark gray color, but makes no different. Very easy to put in the gearbox.

Pros:
- Easy to install
- Feels extremely tough (metal), won't be breaking any time soon.
- Ball bearings

Cons:
- None to list

5/5

"This is a very high quality ball bearing spring guide. I was shocked when i first opened it. Dropped right into my JG AUG will no problems. highly recommend it.