alexallan Posted November 10, 2008 Report Share Posted November 10, 2008 Hi guys, I have an M4 Systema Gearbox M120 and Am planning on Building an M110 based on an A&K SR25. I know the A&K gearboxes aren't bad but why not use my spare systema box? Can a regular M4 Gearbox be made to fit an SR25? or is it indeed just an M4 gearbox with a longer nozzle? Help on this matter would be hugely appreciated. Thanks Link to post Share on other sites
muckymick Posted November 10, 2008 Report Share Posted November 10, 2008 The SR25 gearbox is longer in length so i dont think a standard version 2 will fit .I have modded my sr25 as it uses the same piston as the psg 1 and army r85 i bought a standard piston and piston spacer from airsoft world and filled the last 3 teeth off the sector gear and installed an m130 spring changes the fire selector switch to a standard m4/m16 so you can't select full auto and i am now able to use it at my local site as a semi auto sniper with uber fps Link to post Share on other sites
ertgunner Posted November 10, 2008 Report Share Posted November 10, 2008 you can get a long airnozzle and a gr15 hopup ... i am not sure how much you will have to mod to make it fit Link to post Share on other sites
Jamanyar Posted November 11, 2008 Report Share Posted November 11, 2008 I think the SR25 has a slightly longer body, casuing some issues in trying to fit a V2 standard gearbox into it. Might be best to transfer the gears from the systema gearbox over to the A&K gerabox as well as the other compatible parts, but you'll need a longer piston and nozzle. J. Link to post Share on other sites
ertgunner Posted November 12, 2008 Report Share Posted November 12, 2008 you can get a long airnozzle and a gr15 hopup ... i am not sure how much you will have to mod to make it fit said that wrong ... you would need a GR25 hopup Link to post Share on other sites
shinigami49 Posted November 12, 2008 Report Share Posted November 12, 2008 http://www.airsoftgi.com/product_info.php?products_id=4279 http://www.airsoftgi.com/product_info.php?...roducts_id=3727 I think that these two parts and a new nozzle are the only things you would have to replace to make the standard V2 box fit in the SR-25 body. You shouldn't need anything else if I remember right. Everything else in the box will remain standard version 2. Link to post Share on other sites
ertgunner Posted November 12, 2008 Report Share Posted November 12, 2008 the air nozzle also http://www.airsoftgi.com/product_info.php?...roducts_id=3187 Link to post Share on other sites
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