How far do you have to go to be compliant? Referring to the pic below, is it fine just to grind down B to be flush with surface A? Or do I have to grind down both B and C to be flush with A? Or is even that not enough, and do I have to hack it off along line D instead?

 

There are no set rules. I normally do "D", but have done "B" and "C" for people.

Probably better safe than sorry if you are already breaking out the dremel. I believe my Colt 6940 bay lug was sawed off to be flush with the leftmost border of line D. It does have some remnant below the D line.

"can you mount a bayonet"

 

yes - evil feature

no - not evil feature

 

the law is literal..

"can you mount a bayonet"

 

yes - evil feature

no - not evil feature

 

the law is literal..

 

 

So, would it be possible to mount bayonet with just the ears - "B" ground off?

 

I have no idea how they mount having never handled a bayonet.

So, would it be possible to mount bayonet with just the ears - "B" ground off?

 

I have no idea how they mount having never handled a bayonet.

 

I cant answer that question as Ive never had the proper bayo in my hands. But I ground "B" and "C" down on mine just to be sure

So, would it be possible to mount bayonet with just the ears - "B" ground off?

 

I've never handled one either but I think you're right. I suppose grinding off only A would mean that the bayonet would still mount but couldn't lock in place, so it'd slide off after the first stab? Whereas taking off both B and C would mean the bayonet would slide off the lug by pulling straight downward?

 

@ Nickjc - PM inbound

I've never handled one either but I think you're right. I suppose grinding off only A would mean that the bayonet would still mount but couldn't lock in place, so it'd slide off after the first stab? Whereas taking off both B and C would mean the bayonet would slide off the lug by pulling straight downward?

 

@ Nickjc - PM inbound

 

Thats what I think would happen too, by getting rid of B & C the bayo would just fall off.

 

You can kinda see mine without B & C in this pic

 

@ alowerlevel

 

I think I have the same upper as you Did you cold blue it after grinding it down? Or parkerize/paint?

Spikes 14.5" midlength lightweight w/ dynacomp?

I just slapped some paint on it, was supposed to be temporary until I could get my hands on some cold blue, but more than a year later and its still the same, lol.

I have an M7 bayo if somebody wants to try it. I just have to get it back for sentimental reasons.

@ Old School - If you have a set of calipers handy, can you measure the gap of the lug mounting groove (i.e. where surface A would slide in)? I've ground down B and C to be basically flush with A, but assurances that the bayo wouldn't lock in place would help

 

@ alowerlevel - That's the one!

The groove where the "A" dimension slides into an M7 Bayo is .225"

 

Correction this is a M6 bayo. Pretty sure it's the same.

Just lop it off if your not sure ,, then cold blue it.

 

I just take the ears off ,, B & C flush

Took the whole thing off completely - used a dremel reinforced cutting wheel and lopped the whole thing off, then used a grinding tool to smooth it out. Then hit it with a blue pen.

I keep grinding till I reach rifling, that ought to be safe enough.