Upgradeing parts/brands

gungun

Hi guys,
gonna be doing up a sportline(:D) for christmas
just want to know if the parts i have chosen will all work together

Guarder Upgrade Cylinder for Marui M4A1 ( http://shop.ehobbyasia.com/guarder-upgrade-cylinder-for-marui-m4a1-sr16.html )

PGC Cylinder Head for Version 2 Gearbox
( http://shop.ehobbyasia.com/pgc-cylinder-head-for-version-2-gearbox.html )

Element Original Type Flat Gear Set for AEG
( http://shop.ehobbyasia.com/element-original-type-flat-gear-set-for-aeg.html )

ELEMENT Reinforced Piston w/ STEEL Teeth for Gearbox Ver 2/3
( http://shop.ehobbyasia.com/element-reinforced-piston-w-steel-teeth-for-gearbox-ver-2-3.html )

Guarder Polycarbonate Ventilation Piston Head with Bearing
( http://shop.ehobbyasia.com/guarder-polycarbonate-ventilation-piston-head-with-bearing.html )

G&P 8mm Reinforced Bearing Gearbox for Ver II
( http://shop.ehobbyasia.com/gandp-8mm-reinforced-bearing-gearbox-for-ver-ii-m16-g3-mp5-m4.html )

G&P M120 High Speed Motor for AEG
( http://shop.ehobbyasia.com/gandp-m120-high-speed-motor-for-aeg.html )

Element Vortex Bearing Spring Guide for Gearbox Ver 2
( http://shop.ehobbyasia.com/element-vortex-bearing-spring-guide-for-gearbox-ver-2.html )

Guarder Improved Hop Up Bucking for AEG (50° Hardness)
( http://shop.ehobbyasia.com/guarder-improved-hop-up-bucking-for-aeg-50-hardness.html )

G&P TROY Metal Body for Marui M4/M16 Series (Black)
( http://shop.ehobbyasia.com/gandp-troy-metal-body-for-marui-m4-m16-series-black.html )

Element M4A1 One-Piece Outer Barrel (15 inches)
( http://shop.ehobbyasia.com/element-m4a1-one-piece-outer-barrel-15-inches.html )

King Arms Troy 7" MRF-DI Rail System for M4 Series
( http://shop.ehobbyasia.com/king-arms-troy-7-mrf-di-rail-system-for-m4-series.html )

MAGPUL M4/M16 PTS MOE Pistol Grip (Black)
( http://shop.ehobbyasia.com/magpul-m4-m16-pts-moe-pistol-grip-black.html )

G&P SPR Front Sight for Marui M4
( http://shop.ehobbyasia.com/gandp-spr-front-sight-for-marui-m4.html )

Also, please tell me if any of the brands of parts are a bad idea (I see the price of element parts to be quite low, do they make crap parts or are they decent?)

Compatability is the main question here ( element barrel fitting g&p receiver, element piston with guarder piston head etc.) as i dont want to spend a good bit of a box of parts only to have half of them useful.

Thanks guys.

Leftyflip

CA Sportline gearboxes take 6mm bushings/bearings, the 8mm ones will not fit.
Element is a very good quality brand I use their parts in my guns no problem, hell I'd even build a gearbox solely on Element parts.
All the externals should fit together fine, but don't take me for granted on that. All the internals will fit together fine too. An alternative to the G&P motor is a TM EG1000.
Ger.

gungun

im getting a whole new gearbox, not just the bearings
thank god those element parts are good, the whole lot is costing me enough already
cheers for the quick reply:)

Leftyflip

Don't forget the shims. G&P copper ones are very nice, they are thin enough to get the gearbox perfectly shimmed.