When teaching Armorer courses, we cover suppressor issues and maintenance on the weapons systems. Suppressed guns have more fouling, no surprise as the suppressor reducing the amount of gas pressure that leaves the front end of the weapons system.
Cleaning can differ slightly depending upon the weapon and suppressor, as some weapons systems allow you to disassemble things further and easier as compared to others. An example is that on the gas impingement vs piston systems. On the traditional gas impingement AR15 you can remove the bolt and remove fouling from the tail of the bolt and inside of the bolt carrier. On the gas system you do not remove the gas tube or put anything inside of a gas tube ever imho as you will cause issues a plug the gas system.
Where on a piston system AR15 type weapon (to include weapons like the M1 Garand's and M14/M1A's) where you can remove the piston from the piston block (gas block, or gas cylinder), and then disassemble the piston. Then you can clean and scrape the inside and outside of both the piston and piston block.
The same thing applies on suppressors, as there are some suppressors that are a fixed can, where some others can be disassembled to a point, and some suppressors like many of the .22 allow you to remove the suppressor cylinders and baffle stack.
What we use and recommend in Armorer courses for cleaning is to simply soak the suppressor or parts in Slip2000's Carbon Killer. It comes conveniently packaged in a jar, which allows you to drop a suppressor or parts into it for soaking. After soaking, give the parts a scrub with a brush, then we rinse at the sink with hot water and watch the fouling rinse away, a pot of boiling water can be used if you wish for the water to evaporate when you remove the gun parts, then you can blow things out with an air compressor or if you wish drop the parts into a container of denatured alcohol as the alcohol will remove out all water/oil, and evaporate quickly from the part when exposed to air.
The Carbon Killer won't cause issues with the metal, anodizing, or phosphate/parkerized finishes.
https://www.slip2000.com/blog/...-were-hard-to-clean/
https://www.slip2000.com/slip2000_carbon_killer.php
CY6
Greg Sullivan "Sully"
SLR15 Rifles DefensiveEdge.com(763) 712-0123