According to
Lukey52 and
Rockets88 from PlaystationTrophies, there are nine guns apart from your default weapon--Rivet Gun--and all have four upgrades to be collected, totaling forty upgrades for all ten weapons.
Breakdown by
GETTERniku on GameFAQs.
Ch. 1> 2 upgrades - Rivet, Plasma
Ch. 2> 3 upgrades - P-Sec, Rivet, Plasma
Ch. 3> 4 upgrades - P-Sec, Pulse, Plasma, Flame
Ch. 4> 4 upgrades - Rivet, Pulse, Flame, P-Sec
Ch. 5> 5 upgrades - Pulse, Plasma, Line, Arc, Rivet
Ch. 6> 5 upgrades - Line, P-Sec, Force, Flame, Arc
Ch. 7> 5 upgrades - Contact, Ripper, Pulse, Line, Force
Ch. 8> 4 upgrades - Flame, Arc, Contact, Ripper
Ch. 9> 5 upgrades - Line, Force, Contact, Ripper, Arc
Ch. X> 3 upgrades - Ripper, Contact, Force
*** Spoiler - click to reveal ***
Personally, I used the first link below throughout my playthrough to know where every collectible was and I used the second link below if, when reading in the first link, a collectible needed to be retrieved very quickly so I knew the layout where the item would be located visually. (To be noted, the second link of the video playthrough doesn't show every collectible; such as Chapter 6 when you're going through the Water Tunnels, the player doesn't realize there are collectibles hidden in the vents--above the platforms--that you shoot out to acquire them. The first link lists all collectibles.)
Text:
https://www.playstationtrophies.org/forum/dead-space-extract... by Lukey52.
Video:
by bdcool213.