A lot of semi auto pistols will do this. If you seat the magazine hard it bumps the slide release and the slide closes and chambers a new round all in in one motion. Most folks like this and some don’t. It does save some time if you are shooting a match. Don’t know the self defense implications.So help me understand. What is releasing the slide lock lever with this technique?
Inertia... upon impact, the frame moves forward faster and farther than the slide, thus releasing the slide stop lever.So help me understand. What is releasing the slide lock lever with this technique?
Bob,Inertia... upon impact, the frame moves forward faster and farther than the slide, thus releasing the slide stop lever.
To demonstrate what happens, hold an empty pistol (with the slide locked to the rear) as shown below.
View attachment 174813
Smack the back strap in the direction of the green arrow (below).
View attachment 174815
With a sufficiently sharp smack, the slide will slam into battery.
Now hold the pistol (with the slide locked to the rear) as shown below and smack the front strap in the direction of the red arrow (above).
View attachment 174817
My guess is all that happened is you hurt your hand... and the slide didn't return to battery.
When you smacked the back strap, the frame moved forward faster than the slide... inertia slowed the forward movement of the slide long enough for the slide stop lever to disengage.
When you smacked the front strap, the movement of the frame simply forced a tighter fit between the slide and the slide stop lever... so it didn't disengage.
It's a bit more complex when the bottom of the stock (the magazine well) is smacked... the force splits, as shown below.
View attachment 174819
However, due to the angle of the stock, most of the force is directed forward... which means, with a sufficiently sharp smack, the slide stop lever will release... just as it did when you smacked the back strap above.
Hope this helps.
Excellent, crystal clear description along with detailed photographs!
That does make sense now, especially considering the mass of the slide and the motion imparted to the frame when struck. Thanks for the time it took you to create this explanation!!
Forcing the 'last' round into a magazine can damage the magazine spring and bind the slide.And the story continues.....I bought a glock 10 round mag to solve this problem and discovered a new problem. The new 10 round mag has a spring so strong that I couldn’t get all 10 rounds in without the help of an uplula loader. When I racked a round in and fired the gun I had a failure to feed as in go entirely into battery. Same on the second round. These rounds work fine in the 17 round mags. Looks like the I am back to square one.