Topic: Firing Multiple shots** (Read 1264 times)

Kilibreaux · « **on:** February 06, 2011, 04:28:57 PM »

Okay, I FINALLY tracked down the real cause of those not-so-occasional and undesired "doubles" and "triples" from the GSG.

imschur · « **Reply #1 on:** February 20, 2011, 09:06:24 AM »

Thanks! I think I recall someone else here who had the issue but it may have been two years ago or so and they are no longer around.

FS2KSTD · « **Reply #2 on:** February 20, 2011, 10:24:27 AM »

I have never had any slam-fires occur with my GSG5-SD? I have shot approx. 3000rds from various mfrs. through it with very few FTE/FTF(less than 10?). Got lucky I guess.

Jason631 · « **Reply #3 on:** August 09, 2011, 01:49:41 PM »

So what causes the doubles and triples ? I got a double shot the other day at the range scared me was hoping no one realized it around me

Kilibreaux · « **Reply #4 on:** August 13, 2011, 03:39:34 PM »

A combination of things.
MOST guns have a sear/hammer engagement that acts to force the two into full engagement with light spring pressure. The sear is also very light and not subject to popping out of engagement with a sudden shock.

On the GSG the sear (tiny) sits in the sear "housing" which is a rather longish arm extending forward from the trigger. The Sear arm spring is required to elevate this larger than standard sear housing as well as hold it in place against shock release as can be caused by the GSG's quite strong recoil springs slamming the action shut. The sear housing also has gravity working against it, and to top it all off, the actual SEAR is installed "as cast" so to speak with no attention paid to fine-tuning it's shape for better engagement.
On the Hammer side of the equation, the sear notch is really two notches on either side of a slot that allows the hammer strut to pass. As with the sear, the hammer notches are not crisply cut and fitted, but have generous tolerances. All of this explains why come GSG's never experience "doubles" or "triples" while others seem to have them quite frequently. The Sear housing tends to rise "sluggishly" causing partial engagement of sear to hammer notch, and upon bolt closure the sear is "knocked" out of engagement.

The quickest way to improve the situation is to replace the sear spring with a stronger one, or add a "helper" spring to help "lift" the sear arm quickly enough as well as counter the shock effect of the bolt closing.
A better (additional) solution is to remove the hammer and sear and carefully shape their engagement angle so they tend to slide deeper into engagement with little spring pressure.