Some of you are connected with me on Farcebook might have seen the latest project I've come up with to keep myself off the streets, and out of gaol.
Mainly because I can, and possibly to develop a product for commercial sale, I'm looking at an M-Lok compatible accessory rail for my Marlin 336.
After all, I'm thinking that if I want an accessory rail for this weapon, surely others would like it as well?
As to why? Well... if you mob recall my latest update on The Mistress in the Studboard (https://www.lightfighter.net/to...-marlin-336-in-30-30) I want to mount a Magpul AFG on the fore-arm.
The short version why I'm going for M-Lok over Keymod rail standard:
I'm looking at mounting Magpul furniture and accessories, so thought to stick with the system that's designed for the accessory range I'm planning on using.
M-Lok is a great deal easier to fabricate with the facilities I have access to. This also makes it a damn sight cheaper in terms of machining operations. M-Lok also fits within the limited real estate a bit easier.
Due to my experience in industry and limited engineering, I have some doubts about Keymod holes.
Now, I've done my usual project research with everyone's favourite research tool: Google.
I've also downloaded the Magpul FAQ/info sheet on the M-Lok idea. Really nice document.
So, in order to move forward with this project, I need some data.
What are the accurate dimensions of the M-Lok slots and their spacing?
The Magpul FAQ lists the M-Lok slot dimensions and spacing as “approximate”.
What is the length of the T-Nut used?
I need to calculate the clearance needed between the fore-arm rail and the barrel/magazine tube.
What is the wall thickness of the rail/fore-arm?
Research so far of free-float M-Lok compatible fore-arms for AR-15 series suggests 0.29inches (or 7.366mm). I'm wondering if I can reduce that wall thickness down to 6 or even 5mm, since my application isn't free-float, I'm planning on using conventional barrel band anchor.
So far, I'm looking at doing some designing, and then to convert the design to 3D format for CNC machining. Along the way, I'm planning on using a mate's 3D printer for prototyping of the layout I want.
I'm still trying to work out if I want a tri-rail (slot rails at 3, 6 and 9 o'clock), or a five-rail layout (slot rails at 1:30, 4:30, 6, 7:30 and 10:30). Still doing some scribblings on paper. More to follow on this one.
I'm even thinking about whether to include sockets for push-button sling swivels.
Look forward to any assistance you can provide.