Infamous Front Base Mount 10ML-II
Oct 3, 2010 10:55:39 GMT -5
Post by ET on Oct 3, 2010 10:55:39 GMT -5
This location of the front base mount seems to crop up time and again and give the 10ML-II owner a headache. So to avoid this headache some extra attention needs to be given here as I discovered.
So lets start with the mount screws and length. When I got my mounts the first thing I did was to check the screw lengths of accompanying screws. At first quick glance I didn’t notice anything different but a closer examination revealed there was a slight length difference between the set of 2’s. Seeing this it obviously meant the shorter set of screws belonged to the front mount.
Next was making sure the front mount screws didn’t bottom out before tightening the front mount down. There is a couple of ways of doing this but will leave this for the Tips & Hints to describe.
The next consideration is the front mount location in respect with the recoil lug. Simply no contact should be made with the two, not even the slightest. If there is any doubt at all simply round the forwarding front edge of the mount with a round file or dremel tool. I feel you need to see a distinct/recognizable separation between the mount and recoil lug. If you have steel mounts a touch with Tremclad paint will cover the exposed area but care needs to be taken here that a paint film buildup with an edge is not seen on the bottom of the mount if the brush method is used. You want that mount to sit absolutely flush across the base.
Now for putting it together with screws you want to use a non permanent compound such as Blue Loc-Tite to keep those screws from loosening and applying a recommended torque to these screws.
This should take care of any front mount issues but I’m going to go one step further and add some of my own thoughts here that would relate to SS barrels more than the standard Chrome Barrels because of it’s properties with heat.
Temperature change will cause metal to expand or contract a certain amount depending on the temp range difference and composition of metal. So when you get 2-metal components held together with a screw there is the possibility heat and forces like heavy recoil that MIGHT possibly act to loosen the screw hold. Here just think of uneven heating as it progresses.
If you want another reason to consider keeping that barrel cool when shooting look at this one. Some may easily disagree with this one as a possibility and wonder why I would even consider this. With threads and taps there is acceptable tolerances for fits. If they were all tight fits with the same exact dimensions then that would be another story.
Ed
So lets start with the mount screws and length. When I got my mounts the first thing I did was to check the screw lengths of accompanying screws. At first quick glance I didn’t notice anything different but a closer examination revealed there was a slight length difference between the set of 2’s. Seeing this it obviously meant the shorter set of screws belonged to the front mount.
Next was making sure the front mount screws didn’t bottom out before tightening the front mount down. There is a couple of ways of doing this but will leave this for the Tips & Hints to describe.
The next consideration is the front mount location in respect with the recoil lug. Simply no contact should be made with the two, not even the slightest. If there is any doubt at all simply round the forwarding front edge of the mount with a round file or dremel tool. I feel you need to see a distinct/recognizable separation between the mount and recoil lug. If you have steel mounts a touch with Tremclad paint will cover the exposed area but care needs to be taken here that a paint film buildup with an edge is not seen on the bottom of the mount if the brush method is used. You want that mount to sit absolutely flush across the base.
Now for putting it together with screws you want to use a non permanent compound such as Blue Loc-Tite to keep those screws from loosening and applying a recommended torque to these screws.
This should take care of any front mount issues but I’m going to go one step further and add some of my own thoughts here that would relate to SS barrels more than the standard Chrome Barrels because of it’s properties with heat.
Temperature change will cause metal to expand or contract a certain amount depending on the temp range difference and composition of metal. So when you get 2-metal components held together with a screw there is the possibility heat and forces like heavy recoil that MIGHT possibly act to loosen the screw hold. Here just think of uneven heating as it progresses.
If you want another reason to consider keeping that barrel cool when shooting look at this one. Some may easily disagree with this one as a possibility and wonder why I would even consider this. With threads and taps there is acceptable tolerances for fits. If they were all tight fits with the same exact dimensions then that would be another story.
Ed
