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Old May 11, 2018, 04:50   #1
gf113
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l1a1 cocking handle lug

Whats the best way to drill the l1a1 cockcing handle lug for a roll pin to install it?
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Old May 11, 2018, 15:57   #2
308/223shooter
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Originally Posted by gf113 View Post
Whats the best way to drill the l1a1 cockcing handle lug for a roll pin to install it?
Install it in the charging handle, the correct oriention of course, then drill it.
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Old May 11, 2018, 17:07   #3
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New ones come undrilled.

I assume you want to drill it for a common coil pin and not the correct L1A1 taper pin.

It is way too easy to snap the tiny drill, so I have developed this technique.

With the lug and slide out of the gun, insert the lug in the slide (facing the right direction!). Take a .073" (#49) and drill and drill the charging handle slide until it makes contact with the lug. Repeat from the other side.

Remove the lug. You now have two spots that need to be connected. Clamp in a vise and use a three corner file or a small Dremel cut-off wheel to make a groove.

Now reinsert and drill all the way through, aligning the two holes.
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Last edited by gunplumber; May 13, 2018 at 11:36. Reason: too!
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Old May 14, 2018, 00:04   #4
gf113
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Originally Posted by gunplumber View Post
New ones come undrilled.

I assume you want to drill it for a common coil pin and not the correct L1A1 taper pin.

It is way too easy to snap the tiny drill, so I have developed this technique.

With the lug and slide out of the gun, insert the lug in the slide (facing the right direction!). Take a .073" (#49) and drill and drill the charging handle slide until it makes contact with the lug. Repeat from the other side.

Remove the lug. You now have two spots that need to be connected. Clamp in a vise and use a three corner file or a small Dremel cut-off wheel to make a groove.

Now reinsert and drill all the way through, aligning the two holes.
Will be getting the lug in soon and will use your method. Thank you for the help, it is much appreciated.
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Old May 18, 2018, 07:45   #5
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Instead of using the Dremel's cut-off wheel, I've used the 5/64 (0.078") cylinder point diamond wheel bit to "connect the dots" that I made using essentially the same marking technique described by gunplumber. Work slowly and keep test-fitting the lug until you can no longer see any of the groove you've been cutting obstructing any part of the hole for the pin. The tiny cylinder point rotary bit is truly perfect for this job. Also, I have used bolt cutters and the Dremel tool to fabricate half a dozen perfectly sized .078" dia. locking lug pins from standard steel music wire, blued once I'm happy with fit.
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