Quote:
Originally Posted by kodokks
You said something about putting o-ring behind the 2 prongs on the back half to decrease ur fps. Could you please measure up your 2 prongs for me. The original size is 3mm high. I'm trying to figure out how many mm to cut the prong to increase my fps. and another request, could u please measure how far is the distance from the o-ring to the base of the prong?
 |
My G39 is packed away for the winter, so measuring the prongs isn't practical at the moment.
For guns intended for sale in the Canadian market, the prongs look similar to the image on the right. I would guess that's a little over 1mm. The rubber O-ring I used is the same size as the one used in a WE BB loader (when you disassemble the loader, you'll find the O-ring in the base). To accomplish my modification, you'd simply lay an O-ring flat across the top of the two prongs and reassemble the bolt.
If you have a standard style bolt and an NPAS valve, I would recommend you alter your fps by opening the NPAS valve, rather than filing down the prongs. Because of the short prongs in my bolt, I have to leave my NPAS valve closed at all times, just to keep the rifle within safe field limits.
FWIW, my experiences with the WE G39 have been so good, I've now ordered a WE M16A3 as my next project rifle. After using a GBBR for the tail end of 2010, I won't very often be using an AEG anymore.