The UK's Finest Independent Forum for Shooters and Gun Owners. Est 2010.

I have a Third Eye Tactical scope picatinny rail but I need some screws to hold the rail to the rifle. They didn't have any in stock, anybody know where I can get some asap? Apparently they are 6 / 48 torx heads? The ones at the back are longer than the two at the front due to the 10MOA rail.

Anybody?

MikeyB

I eventually got some from a well known auction site.

Brownells stock them as well.

Be prepared to do some filing... The front two need a fair bit taking off to allow the bolt to close properly.

I may have some in the workshop, I will take a look in the morning, what length do they need to be?

I will measure them in the morning through the picatinny rail and let you know.

MiieyB

Right then, measuring the gun this morning. There are four holes in the top of the receiver. They are approximately (from back to front) 5mm, 5mm, 5mm & the front one being 3.7mm deep. More or less.

The first three go all the way through to the bolt guides on the inside of the receiver so if the bolts are too long they will obstruct the bolt. The fourth hole bottoms out at 3.7mm deep as the bottom is being obstructed by the barrel.

The 10MOA Third Eye rail obviously has a slope to it and if I seat some 9mm threaded bolts through it in all four holes (9mm being the bolts thread length, 11.5mm with the torx cap as well) and measure whats sticking out at the bottom of the rail then I measure (from the back to the front of the rail) 4.25mm, 4.47mm, 6.54mm and 6.7mm - This is whats left sticking out of a 9mm thread.

Now if the first two are less then 5mm (which they are) then they should fit, but they don't. Its almost as if the last couple of threads are missing to stop people running bolts in too far?

Obviously the front two (bolts 3 & 4) are way too long especially the fourth one! So if I take the 9mm subtract whats left sticking out of the picatinny rail and then add what the ideal would be to keep the bolts from bottoming out or hitting the area of non-thread in the hole then the length of thread required should be a maximum length of 8.75mm, 8.53mm, 6.46mm, 5.8mm.

Does this make sense??????? - Christ I have confused myself now! All I wanna do is shoot my gun! sign01

You could probably round these up or down to 8.5mm, 8.5mm 6.5mm and 5.5mm or whatever the imperial version is.

Mike

Just checked and all i can find is #4 and #8 screws, nothing in #6 so I must have used them all up. best order some more I think.

Thanks for looking in any-case. I think I have found some at the back of the cabinet off something else! way too long but a job for the dremmel I think!! ;-)

MikeyB