13
PWC9 Upper (forum.guncadindex.com)

I see mac-11 uppers for sale at:

  1. Aves
  2. Parts Dispensed
  3. JC Arms
  4. MasterPiece Arms

Since MPA only has the side charging upper immediately available, can I purchase a side charging bolt from another vendor ? I'm guessing MAC-11 is a specification as well, so parts should be interchangeable.
If not, whats the opinion of the complete uppers from Aves ?

you are viewing a single comment's thread
view the rest of the comments
[-] pv2025@forum.guncadindex.com 2 points 4 weeks ago* (last edited 4 weeks ago)

Thanks for your input. In looking closer, I may just go with JC Arms build(8inch). In looking at the PWC-9 README, I dont see any reference to the feed ramp. Maybe @nightalliance@forum.guncadindex.com will chime in.

There is no feed ramp. MPA has bolts available. JC Arms feels the best tbh but I like left side charging. My upper is some old maf chimes rn.

We made different height mag releases to lock the mag up in the right spot for it to feed nicely. Some need more or less. Mine needed +.25. That, in conjunction with the location of the mag, allowed the timing to work properly without a feed ramp.

[-] pv2025@forum.guncadindex.com 3 points 4 weeks ago

all good to know.. ill be back in touch once i start the build. eta 1-1.5wks just wanted to get some feedback first before deciding if the build is currently worth it or not.. in the sense of not too many tweaks are needed to get the thing to work.

i already have two unseen builds complete in the past 7 days..

  1. r3
  2. r45

so anything he releases im on it..

thanks!

[-] pv2025@forum.guncadindex.com 4 points 4 weeks ago

yeah... im already there.. debating if i should pick up a second upper.. already have one in flight.

load more comments (1 replies)
load more comments (1 replies)
load more comments (1 replies)
this post was submitted on 04 Nov 2025
13 points (100.0% liked)

General Discussion

394 readers
47 users here now

Discuss anything GunCAD related. If you need help, see /c/help. If you think you're discussing a thing a lot of the time, consider making your own separate community.

Abide by the global rules or be smitten.

Shitty stock image may be changed at moderator discretion.

founded 2 months ago
MODERATORS