Building Confidence

[Caleb]

I will need pictures of what you are working with.

Generally you just insert the tube into the block, tap the roll pin in place and then set the block on the barrel lined up with the gas port. Torque the barrel nut to where the tube freely runs past it into the upper assembly.


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[FfNJGTFO]

Originally Posted by Caleb

I will need pictures of what you are working with.

Generally you just insert the tube into the block, tap the roll pin in place and then set the block on the barrel lined up with the gas port. Torque the barrel nut to where the tube freely runs past it into the upper assembly.


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That's the hard part, actually... ensuring you have all the holes aligned and that the roll pin goes through all 4 of them. I'm finding thst the most difficult part of that process,,, without, of course damaging the roll pin. I will try it with a roll pin holder and a small bit of lube and we'll see.

[Caleb]

Originally Posted by FfNJGTFO

That's the hard part, actually... ensuring you have all the holes aligned and that the roll pin goes through all 4 of them. I'm finding thst the most difficult part of that process,,, without, of course damaging the roll pin. I will try it with a roll pin holder and a small bit of lube and we'll see.

You can align the holes using a guide (for lack of a better word) and then tap the pin in a little at a time with a small hammer/mallet. Do you have a gunsmiths block? Those are handy to have around. I think a little gun oil can help but also might make it slippery to handle.

PS: Make sure the tube is oriented correctly before you pin it. The block sits lower than the upper receiver , therefor the tube steps down into the block from the receiver.


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[FfNJGTFO]

Originally Posted by Caleb

You can align the holes using a guide (for lack of a better word) and then tap the pin in a little at a time with a small hammer/mallet. Do you have a gunsmiths block? Those are handy to have around. I think a little gun oil can help but also might make it slippery to handle.

PS: Make sure the tube is oriented correctly before you pin it. The block sits lower than the upper receiver , therefor the tube steps down into the block from the receiver.


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OK, so find a metal rod (diameter of a paper clip over which the roll pin can fit). Put the roll pin over the rod, insert the rod and align, and then gently advance the roll pin.



The tube is definitely aligned to the upper. I will make sure I use the gun grease sparingly. And I'll use my roll pin holders to advance it to the point where I can start to tap it in.



Thanks much!

[Caleb]

Originally Posted by FfNJGTFO

OK, so find a metal rod (diameter of a paper clip over which the roll pin can fit). Put the roll pin over the rod, insert the rod and align, and then gently advance the roll pin.



The tube is definitely aligned to the upper. I will make sure I use the gun grease sparingly. And I'll use my roll pin holders to advance it to the point where I can start to tap it in.



Thanks much!

That should work, you just need it to help with alignment. Once you have the pin through one side, the other side will be aligned properly.

I’ve been wanting a 320 to just play around with and customize. Just never pulled the trigger on one.


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[Caleb]

Originally Posted by FfNJGTFO

OK, so find a metal rod (diameter of a paper clip over which the roll pin can fit). Put the roll pin over the rod, insert the rod and align, and then gently advance the roll pin.



The tube is definitely aligned to the upper. I will make sure I use the gun grease sparingly. And I'll use my roll pin holders to advance it to the point where I can start to tap it in.



Thanks much!

That should work, you just need it to help with alignment. Once you have the pin through one side, the other side will be aligned properly.

I’ve been wanting a 320 to just play around with and customize. Just never pulled the trigger on one.


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[RKP]

Originally Posted by FfNJGTFO

OK, so find a metal rod (diameter of a paper clip over which the roll pin can fit). Put the roll pin over the rod, insert the rod and align, and then gently advance the roll pin.

The tube is definitely aligned to the upper. I will make sure I use the gun grease sparingly. And I'll use my roll pin holders to advance it to the point where I can start to tap it in.

Thanks much!

How did the above work out for you?

[Caleb]

I just manually cycle the action an feel for any hang ups or sluggish movements. If that feels good, I load up one round and fire it. If the action locks back, I’ll load five in the mag and fire. If that goes well, load up the mag or two and go at it. I don’t do barre break-in on non match grade barrels/rifles.


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[Caleb]

Oh... inserting the CH and BCG is easier done upside down. You should notice two little ears on the charging handle that fit in a slot in the upper receiver towards the back. Insert the charging handle and push it in about a quarter of an inch then extend the bolt carrier group and insert together, push all the way until it clicks.


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[FfNJGTFO]

Originally Posted by Caleb

Oh... inserting the CH and BCG is easier done upside down. You should notice two little ears on the charging handle that fit in a slot in the upper receiver towards the back. Insert the charging handle and push it in about a quarter of an inch then extend the bolt carrier group and insert together, push all the way until it clicks.


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So the Youtube video showed me. All done in a jiffy.


Now, to mount the gas tube/block assembly on to the barrel and align it. Time for that "spaghetti" to work its magic....