Sights for Sphinx SDP Compact?

[rxer311]

I finally got my Sphinx back from the factory and got it out the the range.  I love the feel and function of the pistol but I really HATE the factory sights.  I am consistently getting a POI that is 2-3" low at 7-10 yards.  I am attributing it to the poor sight picture I get with the sights, as I do not have that problem with my P07 (which I actually sold to fund this pistol).  I am familiar and comfortable with a 3 dot setup and I don't like the blacked out rear sight.

I don't necessarily need night sights, but would like a 3 dot setup for this pistol.  I can not find anything that fits the Sphinx SDP, at least that I can find.  Has anybody tried any other sights that have worked?

Thanks!

[jaep1911]

Shooting low seems common with this pistol. Mine hit low as well. 2~3" with the 115 gr bullet and almost on target with the 147 gr bullet at 10yards.

I recall someone was recommending one of these Novak low mount sights but removing the rear sight sounded light a PITA.

http://stores.kensight.com/adjustable/

[rxer311]

Yeah.  I am actually looking for a 3 dot sight.

[danno_man]

I have a new 10-8 sight coming, as the sights I have on hand have been fit.  I'll report back when I have replace it.  The 10-8/Novak rear sight is slightly taller, which will raise the POI a little. I'll measure when I have the rear sight off.

[jaep1911]

I have a new 10-8 sight coming, as the sights I have on hand have been fit.  I'll report back when I have replace it.  The 10-8/Novak rear sight is slightly taller, which will raise the POI a little. I'll measure when I have the rear sight off.

That sounds promising. Please kindly report back hopefully with a procedure. I have heard that removing the rear sight on the Sphinx is a PITA. A heat gun and hammer/ pusher are needed, etc.

[danno_man]

Yep, one set screw came out fairly easily, the other needs heat to break the loctite. I'll probably remove it tomorrow, if I don't get called out.  I'll also mock up the 10-8 sight that I have so we can see what it will look like.

[rxer311]

Thanks.  Very interested in this.  Any chance that sight has dots on it?

[danno_man]

No, but I have some tritium Novak's that I can throw on

[danno_man]

So here it is....

The factory sight height is .290"


The dovetail is .494" on the factory sight.


Novak style sights are either .325", or .375". My 10-8 sight is .325"


The 10-8 sight base (when new) is .500".  The sight that I'm using has been previously fit (.480") so there is a small gap under the sight.  That should close up with a new sight.


Sight installed.

[danno_man]

Shooting low seems common with this pistol. Mine hit low as well. 2~3" with the 115 gr bullet and almost on target with the 147 gr bullet at 10yards.

So filling in the numbers...

5.925" (sight radius) x 2" (low) ? 360" (10 yards) = .033" (sight change either lower front, or raise the rear)

.325" (10-8/Novak) - .290" (factory) = .035"

So this should be pretty close.

[jaep1911]

Awesome! Thanks for taking the time!. Would it be possible to measure the height from the bottom of the dovetail for comparison? I see a small gap under the factory sight. If the gap differed between the two by design, that would change the equation.

[danno_man]

Awesome! Thanks for taking the time!. Would it be possible to measure the height from the bottom of the dovetail for comparison? I see a small gap under the factory sight. If the gap differed between the two by design, that would change the equation.

Stock ~ .130"
Novak ~.128"

So this would put the difference at .033", which is right on.

Edit:
This dimension

[rhart]

Yeah.  I am actually looking for a 3 dot sight.

All my Sphinx pistols have a rear sight with two dots in them that are not painted. To get a 3-dot setup it would be fairly easy to fill in the dots with some high quality paint or have someone who is good at it do it for you. Just a thought - cheaper than buying new sights.

[rxer311]

Mine do not have the dots...

[SBRad]

What size bit/wrench fit the rear sight screws? I'm having the same low POI and the rear sight was not mounted straight. Rear sight was mounted slightly off to the right so it shoots low and to the left.

This is good info. Thanks for sharing your findings