A&K m249 Gearbox Upgrades

phloudernow · June 16th, 2012, 16:08

So, a Friend of mine wants to upgrade his stock m249 he just bought 2nd hand. its been quite used so he wants to replace it with upgrade parts but he dont know what ver gearbox it is, so it would be great if you guys could let me know what Ver. Gearbox it runs and what parts he could use to upgrade it!

Its a A&K M249 para

Kokanee · June 16th, 2012, 16:14

http://www.ottawavalleyairsoft.ca/fo...read-1432.html

Stealth · June 16th, 2012, 16:45

The mechbox is proprietary but alot of the parts are compatible.

The worst part in the mix are the gears. They are horribly shimmed out of the factory. After 200 rounds, the sector gear stripped two teeth.

Grab a decent set of steel gears. Shameless plug but Lonex gears are great for this. They're quiet, steel-treated hardened gears which would work reliably for years.

When you reshim everything pay very careful attention to the bevel-pinion interaction. Any lateral stress and those bearing usually blow. They are proprietary.

The cylinder can use some Teflon tape for a better seal. Nozzle appears to be slightly longer than M4 nozzle. Beware because the cylinder tube seems to be larger in diameter than other products on the market. I didn't take a caliper to it but the inner diameter of the nozzle may be larger than TM parts.

Of course, AoE needs to be fixed too with a spacer or a sorbopad.

Get rid of motor. It's a regular ferrous motor with a really poorly made pinion gear. It's a D type pinion with no screw...and the angle of the teeth does not mesh with the gearset well.

Electricals wise the system uses a micro switch. Don't know first-hand regarding longevity but sourcing a replacement may be an issue in the future.

Overall, with a good 100 dollars spent on gears, motor, and small tidbits, it can be a very good performer.

phloudernow · June 17th, 2012, 18:02

thanks stealth!!! i'll tell him that!!

durak · June 22nd, 2012, 13:44

I dont know if its a problem with the A&K, but my CA saw is having problems with Modify gears. I had a set of modify hight speed gears that worked great forever, they wore out, shaft let go from the gears. anyway, I ordered a new set, and modify has since changed their manufacturing process, their current encarnation of gears arent compatible with CA saw gearboxes, they bind. So be sure to test to see if they will cycle before you put in the motor and piston.

Danke · June 22nd, 2012, 14:32

http://www.arniesairsoft.co.uk/revie...49-para/cat/16

This is the best detailed breakdown of the A&K that I've seen.

What I would suggest is to ignore the internals at the start.

Get a Classic Army Hopup chamber and Nutsack box mag to replace the stock parts. Ditch the stock micro switch in the trigger and then worry about the rest.

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June 16th, 2012, 16:08	#1
phloudernow Trader rating Join Date: Nov 2010 Location: Toronto - Ontario, Vancouver - B.C and Hong Kong	A&K m249 Gearbox Upgrades So, a Friend of mine wants to upgrade his stock m249 he just bought 2nd hand. its been quite used so he wants to replace it with upgrade parts but he dont know what ver gearbox it is, so it would be great if you guys could let me know what Ver. Gearbox it runs and what parts he could use to upgrade it! Its a A&K M249 para __________________ Current Lineup: VFC HK416 Custom Custom Bowie Tactical x SAI Glock 17 (TM Base), Custom SAI BLU Glock Build (Timberwolf Base) Custom Zev Noveske Shooting Team Glock 34 Project Guns Custom Zev Dragonfly G17 (Project) (In progress)

June 16th, 2012, 16:45	#3
Stealth Mr. Silencer Trader rating Join Date: Dec 2001 Location: Toronto	The mechbox is proprietary but alot of the parts are compatible. The worst part in the mix are the gears. They are horribly shimmed out of the factory. After 200 rounds, the sector gear stripped two teeth. Grab a decent set of steel gears. Shameless plug but Lonex gears are great for this. They're quiet, steel-treated hardened gears which would work reliably for years. When you reshim everything pay very careful attention to the bevel-pinion interaction. Any lateral stress and those bearing usually blow. They are proprietary. The cylinder can use some Teflon tape for a better seal. Nozzle appears to be slightly longer than M4 nozzle. Beware because the cylinder tube seems to be larger in diameter than other products on the market. I didn't take a caliper to it but the inner diameter of the nozzle may be larger than TM parts. Of course, AoE needs to be fixed too with a spacer or a sorbopad. Get rid of motor. It's a regular ferrous motor with a really poorly made pinion gear. It's a D type pinion with no screw...and the angle of the teeth does not mesh with the gearset well. Electricals wise the system uses a micro switch. Don't know first-hand regarding longevity but sourcing a replacement may be an issue in the future. Overall, with a good 100 dollars spent on gears, motor, and small tidbits, it can be a very good performer. Last edited by Stealth; June 16th, 2012 at 21:48..

June 17th, 2012, 18:02	#4
phloudernow Trader rating Join Date: Nov 2010 Location: Toronto - Ontario, Vancouver - B.C and Hong Kong	thanks stealth!!! i'll tell him that!! __________________ Current Lineup: VFC HK416 Custom Custom Bowie Tactical x SAI Glock 17 (TM Base), Custom SAI BLU Glock Build (Timberwolf Base) Custom Zev Noveske Shooting Team Glock 34 Project Guns Custom Zev Dragonfly G17 (Project) (In progress)

June 16th, 2012, 16:14	#2
Kokanee Ministry of Peace Trader rating Join Date: Mar 2002	http://www.ottawavalleyairsoft.ca/fo...read-1432.html

June 22nd, 2012, 13:44	#5
durak Trader rating Join Date: Aug 2009 Location: Ottawa, Ontario	I dont know if its a problem with the A&K, but my CA saw is having problems with Modify gears. I had a set of modify hight speed gears that worked great forever, they wore out, shaft let go from the gears. anyway, I ordered a new set, and modify has since changed their manufacturing process, their current encarnation of gears arent compatible with CA saw gearboxes, they bind. So be sure to test to see if they will cycle before you put in the motor and piston.

June 22nd, 2012, 14:32	#6
Danke Prancercise Guru Trader rating Join Date: Oct 2007 Location: Danger Zone	http://www.arniesairsoft.co.uk/revie...49-para/cat/16 This is the best detailed breakdown of the A&K that I've seen. What I would suggest is to ignore the internals at the start. Get a Classic Army Hopup chamber and Nutsack box mag to replace the stock parts. Ditch the stock micro switch in the trigger and then worry about the rest. __________________ Airsoft, where nothing is hurt but feelings.

A&K m249 Gearbox Upgrades

Upgrades & Modifications