Wanting to install a more modern Bead on my shotgun

[Hays47]

I have a polychoked barrel that the ivory bead has given up any premise of use.

The only thing I actually use the bead for is to ensure a good cheek weld to my face.

What started off as a simple project ( no such thing as a five minute job ) has turned into a minor annoyance. I never did like the polychoke solution as to mounting their bead. It is a little push to fit bead mounted in a ramp and the ramp is screwed into the barrel.

What I proposed to do was to eliminate the ramp and screw a bead directly to the barrel. Well the size of the tapped hole has eluded me to this point.

Secondly, I do not know I don't know if they make beads with a large enough thread. Anyone else gone down this dirt road before ?

[M-Tecs]

8-40 and 6-48OS (over size) is the largest thread sizes used for beads that I am aware of. I believe Mossberg uses 8-40 but I am not 100% sure on that.

https://www.midwayusa.com/s?page=2&searchTerm=shotgun%20bead%20sight

http://www.marblearms.com/shotgun-beads.html

https://www.gunpartscorp.com/products/2094510

[G W Wade]

I use a Brownell's kit. Comes with 2 beads of your choice and the proper drill bit and tap. Believe they will about $20 last time I bought GW

[Texas by God]

I have one of every size - except the one that I need at the moment!
I second Brownells.


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[Hays47]

Update I have determined the tapped hole is indeed an 8-40. Texas that is one anomalies of nature in that number of parts needed is always N-1. Where as the N represents parts available and the minus 1 is self explanatory.

[M-Tecs]

8-40 in stock here

https://www.brownells.com/gun-parts/shotgun-parts/shotgun-sights-parts/sight-beads/

https://www.gunpartscorp.com/products/284240a

[Kestrel4k]

Update I have determined the tapped hole is indeed an 8-40. Texas that is one anomalies of nature in that number of parts needed is always N-1. Where as the N represents parts available and the minus 1 is self explanatory.
That actually sounds perfect; the quantity of parts needed is always one less than the quantity of parts available. :-)

[pietro]

.

My Beretta shotgun took a 3-56 threaded Hi-Viz (brand) fiber-optic bead.

[redhawk0]

I second the Hi-Viz brand of replacement bead. I put one on my Mossberg 3 years ago. It's very easy to lock in on even in low light situations.

redhawk