M9 PTP Trigger Weight Too Light !
Posted 25 August 2012 - 04:52 AM
The DA trigger is only 4.5 pounds and the SA a mere 2.5 pounds (average of 10 with my digital trigger scale). I'd like to get the SA weight up to 4.5 to match my 9mm duty Berettas.
Is there a stronger trigger spring that will work? The standard Beretta M92 trigger spring looks like it would fit and it has an extra coil. Anyone tried this? Does it provide a heavier trigger?
Posted 25 August 2012 - 09:46 AM
The M9 PTP is able to accept many real steel parts including grips, magazine catches, and trigger return springs. I'm sure the gun can accept a trigger return spring made for a real 92, but I'm not sure on how long the parts will hold up. The trigger transfer bar may snap where it comes into contact with the trigger since it is not made from steel I believe. The added pressure from the heavier trigger return spring may break other pieces, but you don't know until you try it, right? You could be our guinea pig if you are willing to take the risk and test it out yourself. Good luck!
Posted 26 August 2012 - 05:51 AM
Since the spring only returns the parts to reset and they don't take much force to move I'm not convinced a heavier spring will put any stress on the parts. But that's a guess and part of the fun of being a guinea pig.
Posted 07 September 2012 - 04:19 PM
Posted 07 September 2012 - 06:38 PM
//sorry for odd autocorrect words by my phone//
Posted 08 September 2012 - 06:20 AM
1. Trial 1: Cut the lightest M92 mainspring I could fine (16#) to M9PTP length. Intuitively knew it'd be too strong. Dry fire trigger weight was the same as an issue M9 pistol. DA 12+ pounds (groan); SA 6 pounds. Very notchy (is that a word?) trigger pull but the pistol did function properly albeit with gas out the ejection port the first few shots from a freshly charged magazine.
2. Trial 2: Shortened the spring another two coils. Very smooth trigger pull with a DA weight of 7.5 pounds and a SA weight about 4.0 pounds. Darn near what my M92G weighs with a "D" mainspring. Same gas blowout the ejection port for the first few shots from a freshly charged magazine. The shorter spring has less constant load on the hammer.
Chronograph data with the new mainspring is the same as with the factory spring (within a pound). Recoil seems unchanged.
I'll try this on my new M9PTP after the warranty expires?
Posted 26 September 2012 - 09:22 AM
Had not too many, but several misfires, or better: early-fired shots with mine during timed practice.
Perhaps I'll try the mod you described, just to get the PTP closer to 92FS feeling I can.
Posted 26 September 2012 - 02:28 PM
Not sure if you can find a 19# M1911 mainspring but I use this spring in my Beretta M92G pistol. I'd have cut this spring down for the M9PTP, but darned if I can find my pack of springs.
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