A few gun smithing questions regarding the m305

[Bakersfield7.62]

So I have been working on my new m305 , I got the flash hider off and this installed

Now that I can remove the gas lock I tried flipping it to get a tight lockup but it tightens before it gets in place
question #1 if I remove a little bit of material from the gas lock test fitting it until it needs a little tap into the 6 o'clock position is this the alternative to shimming ? Or will this change after fireing requiring shimming more and more with wear ?

Question #2 what is the best way to tighten the oprod guide so that it does not move side to side on the barrel band ? I have seen the preening method with a center punch on here but I would like to know of other methods

Any other tuning advice is appreciated I will chime in with any pic's or information required to answer the above questions

 

[Pop]

1. If you're careful not to remove too much, it should work fine. edit: it should be finger-tight at around 4:00 or so.
2. The peening method is by far the best solution. I've tried just using JB Weld and it broke easily. A spot weld will work but you risk damaging the chrome lining of the barrel.

edit #2: if you haven't taken it out and shot it yet, do that before you start making any more big changes or upgrades so you have a benchmark for potential improvements.

 

[chalkriver]

The peening method of tightening the op rod guide is very easy to do and works great .

 

[romurra]

you can also use the thick green lock-tite goo. it's a slimy zombie-green colour and is not generally available at CT, etc., but Napa will probably have it.

 

[dieseldawg]

Where the hell are you guys getting muzzle brakes from!! Hahaha

 

[Bakersfield7.62]

Where the hell are you guys getting muzzle brakes from!! Hahaha

The above muzzle device is a griffen Arm flash comp mounted on a smith enterprise threaded adapter both are from armtac

 

[dieseldawg]

i take it you bought them a while ago as there sold out of damn near everything! haha