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Guarder Bore-Up Cylinder Set for M16A2 Series Airsoft AEG

2 Customer Reviews

by Ian P. on 09/25/2011
"I just finished installing this on my m16 SPR mod 0 and from what i can tell all of the parts work very well, a couple of things to mention are that the oring that comes in the package for the piston head is a bit small for the cylinder so i would invest in a larger oring for a better air seal. The other thing is, when you are securing the piston head to the piston get a good grip and make the crew as tight as possible without stripping it. I though i had it on tight, but while shimming the gearbox i test fired it and the crew backed out and became loose and the cylinder head started bouncing around in the cylinder.

Pros: So far all the parts are holding up
good fit in the ver.2 gearbox
oring seal tappet plate
Quiets the slamming of the piston head against the cylinder head

Cons: Small oring poor air seal (cheap though so only small con)
screw backed itself out (may have been operator error though)

Overall can't go wrong with this if you have an m4/m16
by johan e. on 02/29/2012
"I've installed this bore up system on my sr10 kwa , from stock cylinder my fps was running around 450 on an m130 spring , now it shoots around 500 fps with an m130 pdi spring , wow! It's incredible!