[viking9934]

So i'm looking to buy an M4 Gbbr and after reading tons of review on the WE couple on the Kwa and others on WA....i am more confused and undecided that before.

Contender are:
We m4/416 open bolt
Kwa m4 pts gbbr

I understand that the kwa is fairly new and is based on the WA system with Kwa own recipie.
WE-tech have good and bad review , mainly due to the ''Loose'' tolerance and finish.

I plan to modifies the M4. I know ra-tech make a lot of internal parts for the We m4. does any part is necessary to buy to make the gun reliable?

Since the kwa is new but based one the Wa i should have acces to WA aftermarket part? or am i wrong

Any advice and argument why one have the upper hand.