comparison help! please M16A1

doubt it as i dont think all the pfc firing parts would fit into a GBB reciever, but I'm sure someone with more knowledge could help you.

However on this project I've gotten too depressed and confused so have put it to one side until I can clear my head/frustrations!!.. wish I had bought a ready made one now lol.

VFC M4A1 lower and upper are accurate to the real steel. I sussed this out with the gun shop owner here in Taipei. Its just a thought - but good luck with your project.

I could very well be wrong about the GBB fitting, I'm new to model guns etc myself. try asking as a new question so more people are likely to read it, may get a more positive answer your looking for./

Rat wrote:

However on this project I've gotten too depressed and confused so have put it to one side until I can clear my head/frustrations!!.. wish I had bought a ready made one now lol.

We've All reached this point too at some stage or other

Which part of the build is causing you bother at the moment Is it the bolt sticking or the Buffer

When you're head's clearer let us know, I'm sure that together we'll help you sort it

I can't comment on GBB Receiver's fitting but I know that GBB trigger components won't fit Marushin's M16 (tried it to replace a broken trigger)

Rat wrote:

However on this project I've gotten too depressed and confused so have put it to one side until I can clear my head/frustrations!!.. wish I had bought a ready made one now lol.

I know the feeling to well :-)

My first assembly kit (Marushin S&W Model 2) put me away from buying kits for a few years. It wasn't until recently that I acquired a Marushin XM177 kit, and got frustrated over it, too ;-) Fortunately the end result in case of XM177 is much more satisfying, even with all ongoing stumbles.

Now that cap supply has been restored I plan continue work on tuning it to work properly.

Have calmed down a bit now, still not keen on touching the thing again but sshall push myself this weekend to see if i can get any closer to completion, have a show on the 25th and would like to take it along to show the folks in the group how good it is (as a model as opposed to my handiwork lol)

fingers crossed!!

run into yet another hitch lol!

it appears I have finished the build and everything looks complete from the outside, however I carn't cock the blighter!! seems the bolt is locked in place!

any ideas please folks.

Hello Rat,

Has the bolt locked up in closed position or pulled back and open

Ir was stuck in closed position


however taking it to the show today and within a few minutes with a "pro" it now works, still sticks abit but works. only thing is i now need to put the ejector shelf back it, but she cocks and dry fires even if it sticks abit.

just noticed something

the bolt seems to be a bit too high to chamber a round, it'll do it but its not as smooth/clean as i would have thought!!

is this a normal problem?

JohnnyV had a similar problem, where bolt was "jumping" too high over the magazine:
https://mp40modelguns.forumotion.net/t2370-improving-the-marushin-xm177e2-firing-performance