By guide rods, are you talking about the two pieces of plastic with the small springs that fly out when removing the hop up from the outer barrel?I haven't had any jams since I removed the guide rods, so I'm glad to have removed them
That being said, I still keep them, should I ever need them again...
The airsoftpro piston is fairly nice, it gives a 100% seal but the bolt push gets a tad stiff because the O-ring is slightly too large I think. Can't compare it to the PDI one though since I don't have one :shrug:
But as always (lol), I'd recommend airsoftpro, especially for the price :tup:
Same with me for the most part. The 0.36g sometimes get jammed but is easily fed by tilting the front of the gun down slightly.I have never had any loading issues with BB's up to 0.36g. The 0.40g I use sometimes do get jammed (all BB's madbull's - hate the grey colour). The rifle (my signature) is otherwise great.
BTW what dimensions have you printed those barrel spacers?