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2/23/2025 12:34:35 AM EDT
Recently picked up my DLO/SRT Sterling Mk 5 from tax-stamp jail and before shooting it decided I should clean it properly. I emailed Doug Melton at SRT and he told me how to take it apart, the front cap holds the outer tube in place. It unscrews from the baffle stack, the outer tube is purely decorative (and a way to mount the front sights, the sling attachment and the wooden forend). After removing the front cap and the rear underneath set screw it is supposed to slide off (slip fit).

Well, it doesn't. Gun has definitely seen some use, the suppressor has never been cleaned. But I can't get to the muzzle to remove the suppressor until that damn outer tube is removed.

I was wondering if Kroil would work on the slip fit (sprayed between the baffle stack and the outer tube).

Any ideas?

2/23/2025 12:38:39 AM EDT
[#1]
2/23/2025 9:49:39 AM EDT
[Last Edit: prebans][Edited] [#2]
Originally Posted By madkiwi:
Recently picked up my DLO/SRT Sterling Mk 5 from tax-stamp jail and before shooting it decided I should clean it properly. I emailed Doug Melton at SRT and he told me how to take it apart, the front cap holds the outer tube in place. It unscrews from the baffle stack, the outer tube is purely decorative (and a way to mount the front sights, the sling attachment and the wooden forend). After removing the front cap and the rear underneath set screw it is supposed to slide off (slip fit).

Well, it doesn't. Gun has definitely seen some use, the suppressor has never been cleaned. But I can't get to the muzzle to remove the suppressor until that damn outer tube is removed.

I was wondering if Kroil would work on the slip fit (sprayed between the baffle stack and the outer tube).

Any ideas?

View Quote


Call back Doug, explain the situation, and ask if he has any other advice.  

Sounds like moderate to severe leading.  You may need to take it shooting with your disassembly tools and gloves.  Get it hot and then try opening it.  Theres some risk to this method, but I’ve done it with some success.
“Don't post anything here or send anything you aren't willing to defend in court.”

-Notcalifornialegal
2/23/2025 12:21:38 PM EDT
[#3]
If Kroil doesn’t work you could try soaking the front end in Breakthrough suppressor cleaner which is safe for aluminum (not knowing materials of construction).  I don’t know if that will attack the finish and that cleaner is relatively expensive but is reuseable even when pretty dirty.
2/25/2025 2:28:17 PM EDT
[#4]
So I called John Andrewski. Doug told me he sold these suppressor kits to Stan so I figured John might know something about it.

Good thing I did. John did the actual work on these, he was working under his dad's SOT at the time. He remembers putting these together in the 2000-2006 time frame.

He told me the outer sleeve didn't exactly just slip on, it was a bit of a tight fit. Here's a picture from the cap end-



He told me he never cleans his suppressed Sterling and his advice was to just put it back together and not worry about it. If I really want to get the outer sleeve off he thought I could send it to him to work on it. That way if the krinkle finish or anything else gets screwed up he could make it right.

Thinking about that...

Well I already had 4 of the baffles out so I am cleaning those anyway (nothing works well, used Breakthrough last night). I might try some Kroil inside the baffle stack to get the last baffle out (it's crusty, the first two came out easily, the 3rd and 4th needed to be worked with my fingers but I can't reach in any further).

Before cleaning, much better now but not perfectly clean.



What is best for cleaning Kroil off metal? I am figuring either paint thinner or alcohol. I know acetone would work but it would probably remove the krinkle paint too. I know I need to get all the oils out before I try firing the gun.

Thanks.
2/25/2025 10:38:06 PM EDT
[#5]
clean the baffles in a ultra sonic with water and simple green.

threads lubed with mobil 1 syntheitc axle grease hi temp red color.

threads to clean use a brass and nylon brush and clean them well. non chlorinated brake clean works well on carbon.

this is what i do in suppressors.
3/17/2025 8:11:18 PM EDT
[#6]
I use a little bit of high temp copper never-seize on my suppressors threaded sections.  I'm not sure if that is ever harmful in anyway but would think it would help with future disassembly.

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