I'm having trouble finding a Red Dot Sight that will hold point-of-impact for hand guns. I've tried Holo Sight, Optima 2000, and have had limited sucess with the LG-35.
I'd really like for the Optima 2000 to work on my V-16 Springfield.
If the sights and mounts are properly installed and have remained tight (loc-tite helps if that is a problem) then you have a quality problem with the sights in question. I personally avoid like the plague anything with Tasco's name on it. I have had good results with the Burris speed-dot 135 on my Taurus Raging Bull .454 Casull, but that sight may be bigger than what you are looking for. Another one you might want to take a look at is the Reflex sight made by Trijicon, which is used by the good people at SOCOM for shorter-range work. If it will hold up through what those people put them through, they should be able to handle about anything we throw at them.
I recently purchased an Aimpoint Comp ml for my Ar15. Very heavy duty as it is designed for and used by our special forces. My rifle is a short 14.5" .223 with a compensator, with the short bbl there is a recoil that is noticeable. The sope has NEVER shifted yet.[1000rounds] I know that aimpoint makes Pistol scopes, although if I was gonna put a red dot on a pistol it would be the ml.
The only downside to the Aimpoint is the price... In the 250-350 range, depending on who is selling it. Try Aimpoint's site for the specs; although they do not sell directly to the public form the site. <!--emo&--><img src="http://beartoothbullets.com/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''><!--endemo-->
I have a Millett Red Dot on my Ruger Super Redhawk 44 Mag. I have shot hot loads and no problems. I have shot over 100 rounds and the scope stayed on target. I just purchased a 2nd one, thinking of putting it on my 454 Casull. <!--emo&--><img src="http://beartoothbullets.com/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''><!--endemo-->
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