It does have some flaws but the externals are great, it does need some new parts but its still a cheap PTW once you get the kinks worked out. My buddy is having feeding issues with his currently. I have it on my desk as he can't seem to figure it out so I'll see whats happening and write back. Electronics I added some thin heatsinks to and seems to be maintaining the heat better, since this is a part that will overheat and break.
I downgraded the spring to an M115 and it sounds so much better, and able to run off a9.6V easily. I would definitely stay away from LiPo as the power electronics boards would heat up and toast pretty quickly. Also downgrade the spring before you shoot it, as it struggles quite a bit even with a 12V to pull it, with weak electronics I definitely don't recommend it.
But it also isn't 100% PTW compatiable, the lower doesn't mesh with a PTW upper and vice versa as the body pins are slightly off size
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