Bolt Disassembly Tool For LMT MWS

[Fire4EffectCA]

Does anyone make a bolt disassembly tool for the MWS dual ejector bolt? I find that the Y/M 308 tool does not work well for removal of the ejector roll pins.

I thought about modifying the Y/M 308 tool, but I don’t have a milling machine and I don’t want to do a hack job. What needs to be done is to create two holes that are located at the two punches indicated by the red arrows. I thought about just drilling a single hole the size indicated by the yellow circle to cover all roll pin combinations, but I am not sure if this would compromise the front support for the bolt when driving the ejector pins out.

 

[papershredder]

I don't know of any fixtures that can be used for the LMT bolt. But I see some ways to go about modifying your fixture. A quick and dirty way would be to drill the pre-existing holes larger or chuck a small (like 3/32" or 1/8") endmill in a drill press, line it up to where the ejector pins would be located in the fixture and "drill" with the end mill. One caveat about drilling the holes larger is if they overlap, the drill will try to walk and/or slip in the chuck. Make sure the table is locked down tight and the fixture is clamped down tightly, feed drill slow. The other ways to go about modifying the fixture, you'll need access to or know someone with a milling machine. One would be to take a small end mill and mill a slot extending from the pre-existing holes. The other way is to mill the face that the lugs seat up against back until the ejector pins of the bolt line up with the pre-existing holes. I wouldn't worry about weakening the fixture because the lugs should be making contact all the way around the face. The only other thing to check for is to make sure that screw for depressing the ejectors is a large enough diameter to contact both ejectors yet small enough to fit in the recess of the bolt face (13/32" to 7/16" going by the measurement of my lmt bolt).

 

[TheOE800]

Lolwut

Classified Defense - Ultimate AR10/SR25 Bolt Maintenance Too

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[papershredder]

Yeah, my bolt fixture is a wooden block with Kant - Twist clamps to keep ejectors from flying and to press them back in place. I haven't heard about that one, but on the other hand filament 3d printed stuff tends not to handle shock and impacts too well. I don't see that fixture having a very long life span with most people. With minor modification, OP has a tool that will last a lifetime.

 

[Fire4EffectCA]

I don't know of any fixtures that can be used for the LMT bolt. But I see some ways to go about modifying your fixture. A quick and dirty way would be to drill the pre-existing holes larger or chuck a small (like 3/32" or 1/8") endmill in a drill press, line it up to where the ejector pins would be located in the fixture and "drill" with the end mill. One caveat about drilling the holes larger is if they overlap, the drill will try to walk and/or slip in the chuck. Make sure the table is locked down tight and the fixture is clamped down tightly, feed drill slow. The other ways to go about modifying the fixture, you'll need access to or know someone with a milling machine. One would be to take a small end mill and mill a slot extending from the pre-existing holes. The other way is to mill the face that the lugs seat up against back until the ejector pins of the bolt line up with the pre-existing holes. I wouldn't worry about weakening the fixture because the lugs should be making contact all the way around the face. The only other thing to check for is to make sure that screw for depressing the ejectors is a large enough diameter to contact both ejectors yet small enough to fit in the recess of the bolt face (13/32" to 7/16" going by the measurement of my lmt bolt).

The Y/M 308 fixture works perfect for installation of the ejector roll pins. The only problem is removal of the ejector roll pins for disassembly.

Unfortunately I don’t have the necessary tools to bore new openings into the curved surfaces. That is why I considered drilling one large opening from the flat rear to the front. I have reached out to the manufacturer of the bolt disassembly fixture, but have not heard back.