How do I detail Strip 870 Marine Magnum

[hunter44]

Recently acquired this police turn-in shotgun in like new condition (except the inside that I haven't seen). I am supposed to strip it down and thoroughly clean and lube. Right? But how does a complete newbie to this gun do the stripping down?.
The gun did not come with a manual and the downloaded one from Remmy's website is sketchy on disassemble instructions on page 12. It says: 3) Slide the fore-end forward approximately halfway. 4)Take hold of the barrel ahead of the magazine tube and pull the barrel from receiver. That has not worked for me.

I then went to the achives on TFL and Dave's links at the top of the page on THR but am still at a loss as to how to remove the barrel and proceed beyond that. What am I supposed to do that I am not doing or what am I doing wrong? Do I need to take it to a smith and watch that very first time strip down?

 

[Dave McCracken]

(Hitching up belt, spitting on hands) Here we go....

After making sure it's unloaded, unscrew the magazine cap and remove. With the forearm forward of full rear position, pull the barrel off. Now ease the forearm forward, and insert fingers into the loading port. Push in the shellholders until you can pull the whole assembly forward and off.

Using some plastic or wood tool like a golf tee or chopstick, drift out the trigger group pins and remove the TG. If the staking on the shellholders doesn;'t hold, they'll drop out also. No big, just replace when reassembling.

Empty the mag tube by removing the spring stop. Older ones are a steel donut, pry up with a thin bladed screwdriver. The newer plastic atrocity just turns a bit and can be removed.

Now clean all surfaces and lube lightly with CLP or SLIP 2000.

The only tricky part of reassembly is getting the forearm and bolt back in. Make sure the bolt and carrier plate are in the notches in the action barts, and putz with the shell holders until the action bars go "Home".

There, and it took a lot longer to type than do...

 

[buzz_knox]

What about replacing the safety with a jumbo safety? Is that easily done or should it be left to someone with more mechanical skills than a dead toad (i.e. someone other than me)?

 

[Dave McCracken]

I'm a "Tool Challenged" guy. I've no idea how hard it is, but....

The bigger it is, the easier it is to get knocked off accidently. And in 40 years and maybe as much as 50K rounds,I haven't missed the standard one yet.

Lots of folks have swapped their safeties for oversized ones, and I've heard few complaints about them. I just do not see the need. YMMV.

In any case,it's not expensive and easily reversed if necessary. It may be worth the gamble, especially if you fumble with the standard on occasion.

HTH....

 

[NIGHTWATCH]

I would suggest using Kleen-Bore "Gunk Out" spray to remove any old lube and surface rust. Making it bone dry before lubricating again. To lube I would use Kleen-Bore "TW25 B" high tech oil. Just my 2 cents.

 

[tango3065]

Dave are u saying he can put the shellholders back in without restaking them? Wouldnt this cause some future problems and malfunctions?

 

[Dave McCracken]

One of the latches on my TB needed restaking. I had it apart at least twice before a smith redid the staking. No malfs/probs, other than the slight annoyance of getting it back in.