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Question on Unertl Mounts - standard versus Posa (Read 9411 times)

texasmac Frequent Elocutionist Offline Posts: 1893 Location: Central Texas Joined: Aug 16^th, 2004	Question on Unertl Mounts - standard versus Posa Nov 12^th, 2008 at 2:08pm	Print Post
	Hey guys, Not knowing a whole lot about Unertl rear mounts, I have one or two fundamental questions. See the photos below. One is of a mount I have, which has a standard or regular base (not sure which is the correct term). The other photo is of a mount currently listed on eBay, which is reported to have a Posa base. It looks like a standard base mount that has had the base split or cut. So my questions are: 1)Is the split in the base and the different base screw the only differences between the regular base and the Posa base? 2)What are the advantages or disadvantages of the Posa base, if any? I assume it’s to allow for a firmer/more rigid attachment, but don’t know Inquiring minds want to know. Wayne (You need to *Login* or *Register* to view media files and links) Click on image for larger photo (You need to *Login* or *Register* to view media files and links) Click on image for larger photo

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fallingblock ASSRA Board Member Offline Posts: 633 Location: Wisconsin Joined: Apr 16^th, 2004	Re: Question on Unertl Mounts - standard versus Po Reply #1 - Nov 12^th, 2008 at 2:34pm	Print Post
	Quick reply as I am at the hospital with my son. The posa mount is split and the screw is not cup shaped to fit the base but is round if I remember about a 1/4" and fits a different base.I have both kinds and find they work but the posa base does not have the tendency to mess up the base. Cheers, Laurie

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boats Frequent Elocutionist Offline Posts: 7540 Location: Virginia Joined: Apr 23^rd, 2004	Re: Question on Unertl Mounts - standard versus Po Reply #2 - Nov 15^th, 2008 at 7:11am	Print Post
	Most Unertil rings you see are standard. The end of the screw is cup shaped to fit a matching bump on the scope block. Posa mounts generaly are on the larger heavy scopes, example my BV is Posa while my 12x target is not. Screw end on the posa is flat bottomed and fits a flat bottom cut out on the scope base. suposed to be more stable for heavy recoil or larger scopes. Boats


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texasmac Frequent Elocutionist Offline Posts: 1893 Location: Central Texas Joined: Aug 16^th, 2004	Re: Question on Unertl Mounts - standard versus Po Reply #3 - Nov 15^th, 2008 at 8:51pm	Print Post
	Guys, Thanks for your responses. Looking at my standard base and at the photo of a Posa base, it would seem that one can convert a standard base to a Posa base by splitting the base and changing out the screw. Is it that simple? Wayne

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AndyZ Full Member Offline Posts: 227 Location: Madison, Ct. Joined: Apr 16^th, 2004	Re: Question on Unertl Mounts - standard versus Po Reply #4 - Nov 15^th, 2008 at 9:09pm	Print Post
	T_Mac It's not quite that simple. Woulden't ya know??? To get the original clamp screw out the mount must be removed from the scope so that a very small allen set screw can be removed. This set screw bears on the end of the clamp screw. In doing so it usually makes a mess of the thread and that bad thread unscrews all the way out - not doing the female thread in the mount the least bit of good!!! IF it comes out without damage then it is easy to cut the mount and put in a Posi clamp screw ( if ya got one!!) or the original might work. If the female thread in the mount is unusable it must be tapped one size larger and a new clamp screw fabricated. That what i had to do!! So it is very possible but not quite easy. If i can provide any more info just ask. andyZ PS I consider the Posi FAR superior to the standard mount.


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boats Frequent Elocutionist Offline Posts: 7540 Location: Virginia Joined: Apr 23^rd, 2004	Re: Question on Unertl Mounts - standard versus Po Reply #5 - Nov 15^th, 2008 at 9:58pm	Print Post
	Be easier to get bases that are posa one side regular the other, turn them around to suit your scope. Like Andy said I like the posa better than standard but not enough to try to try to make Posas out of Standards Boats


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