Airsoft Canada - View Single Post - Huge FPS loss (~150 FPS)

dpvu · December 30th, 2008, 04:10

It could be the nozzle and hopup unit do not align or seal properly. Maybe try your M4 mechbox in your SPR and see if you get a similar FPS loss. Since the SPR upper works great with your M4 lower, it seems like the problem is in the SPR mechbox or the interface between the mechbox and hopup.

December 30th, 2008, 04:10	#2
dpvu Trader rating Join Date: Mar 2008 Location: Calgary	It could be the nozzle and hopup unit do not align or seal properly. Maybe try your M4 mechbox in your SPR and see if you get a similar FPS loss. Since the SPR upper works great with your M4 lower, it seems like the problem is in the SPR mechbox or the interface between the mechbox and hopup. __________________ JG HK416 KWA USP