suppressor = blow back + no slide lock + dirt ???


May 15, 2010, 04:32 PM
Recently rented a suppressed Glock 17 just for the experience and have a few questions:

1. Why does it blow powder particles back in my face?
2. Why doesn't the slide lock back on the last shot? (I checked to be sure that it did lock back without the suppressor.)
3. Why does the gun get dirty quicker?

I suspect the answers may relate to addtional pressure that is created by the suppressor, rather than being normally released out the barrel?

If so, does the addtional pressure call for a heavier slide spring to avoid banging the slide against the stop and prematurely wearing out some parts?

Regardless, I am rethinking the notion that a suppressed handgun may be a good choice in the house, because either I have to get safety glasses before firing, or deal with powder in my eyes on any followup shots.

FYI -- I was shooting 115gr FMJ range ammo. (The subsonic JHP was >$40/box!)

This is the first time I've shot a suppressed firearm and am just starting on the learning curve. Thanks for all insight.

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May 15, 2010, 04:53 PM
Okay, first issue - the silencer was probably not new. Older tech isn't as good regarding blowback and sound reduction.

Second issue, you were using subsonic ammo.

Third issue, the springs in both the gun and the silencer are most likely worn.

Basically, a silenced G17, in my experience, has very little blowback, is quite clean (though indeed dirtier than without a silencer, obviously) and does lock back on the final round.

With a proper silencer, properly maintained gun, and proper alignment of bore to silencer, it is perfectly safe and entirely practical to have a silenced HD gun. :)

May 15, 2010, 05:29 PM
Second issue, you were using subsonic ammo.

If he was shooting 115 grain it was more than likely supersonic, not subsonic.:neener:(just playing with you PTK)

As for the slide not locking back my thoughts where on if the suppresor had a neilson device or not, and how that may affect it.

May 15, 2010, 05:48 PM
Errr, you knew what I mean, gorram it! :D

May 15, 2010, 06:37 PM
unburned propellant will strike the first baffle in the blast chamber and get redirected back in the barrel and cause fouling at times if the chaber is on the smaller size
all above reasons are possible including
1.short stroking on the recoil so the slide hold open is not engaged. neilson devices (aka boosters) help prevent this.
Short stroking may occur due to lack of kinetic energy to overcome the mass of the suppressor at the end of the barrel as the slide move rearward. ( the booster gives a little kick so to speak to fully cycle the slide)
also rental firearms are not always the cleanest most well cared for firearms as downtime for cleaning cuts in to rental availability

May 18, 2010, 03:42 PM

Before we start we need some answers to basic questions.

1. Wet or dry suppression?
2. Neilson or static can?
3. What can?

Then we can all start guessing.....

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