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[scubasteve]

Anybody know?

I am not a fan of the weird bucking in my Echo1 M249 Para and I noticed that the G&P chamber uses regular AEG buckings, but will it fit and feed properly?

[Casper_Chua]

Echo1/A&K M249 stock hopup chamber can use regular aeg bucking as well. I've been using Firefly or KWA 2G bucking in mine for years.

[scubasteve]

I tried installing an AEG bucking in mine and the lips from the bucking protrude too far in and block enough of the feed hole for the bbs to cause serious jamming issues. The chamber itself doesn't lock into the gun tight and can be rotaded in the receiver. If you do not put it in correctly, it will jam. I could buy a new Echo1 chamber, but I would rather give the G&P a try if it will fit correctly because I like the way the hop adjuster works. I read that a Classic Army chamber will fit, but I am not sure if the CA and G&P are compatible.

[Maydie]

I'm pretty sure the CA/E1/AK M249 hop ups will not be compatible with the G&P. If my memory serves me correctly they even look totally different. Try a different bucking, my Systema bucking has been in my A&K 249 for two years with about 30k rounds through it with not a single feeding problem. What kind of bucking were you using?

[scubasteve]

I tried a madbull bucking. After I could not get it to feed, I modified a VSR bucking and made it work. The biggest issue is that when I got the gun it did not come with a nubbin. I half way made one that gets the job done, but often when adjusting the hop-up the nubbin will tip over and disable the hop-up. I was hoping to go with the G&P to take advantage to a AEG style hop-up adjuster arm. I will give making a better fitting nubbin a shot and try a few more AEG bucking, if I can't get that to work I will just buy a new Echo1 complete chamber set. Thanks for the help guys!

[Maydie]

In my experience madbull buckings, especially the blue ones, suck. Try a Prometheus, Fire Fly, or Systema bucking and see how that goes. I remade the nub in mine as well as the one it came with was far to short. I used a piece of 16 gauge wire insulation and played around until I got the right length. Hope that helps

[league 4]

G&P hopup unit's are similar to an AUG's, the A&K/CA/PGC type is not. And get a CA chamber instead of an E1 chamber, they're much better made IMO and was worth getting.

[mindwreck]

get a systema and be done with it. the madbull ones are made to have that lip. if thats the problem. don't get them! get a regular bucking. my old systema went through 60k rounds before i retired it. still fine but at 6 bucks i just replaced it for the hell of it.