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AR15.COM
5/17/2015 8:20:36 PM EDT
got a new g20 sf slide locks back with 1 round left in mag. both mags.
5/17/2015 8:31:08 PM EDT
[#1]
Your thread lacks some information
What ammo were you using ?
Did you try more than 1 type of ammo ?

Have you ever shot a Glock 20 before ?

Try downloading the mag a couple of rounds and break it in ,

Did you lube it ?
5/17/2015 8:59:01 PM EDT
[#2]
armscor 180 gr. only ammo had at time . shot 3 g20-s  did clean and lube. got ammo odered. shot many modle goclks just seeme strang.
Quote History
Quoted:
Your thread lacks some information
What ammo were you using ?
Did you try more than 1 type of ammo ?

Have you ever shot a Glock 20 before ?

Try downloading the mag a couple of rounds and break it in ,

Did you lube it ?
View Quote

5/17/2015 10:16:57 PM EDT
[#3]
My experience has been that Armscor is pretty week stuff.  Lock the slide back tonight and let it set all week, try it again next weekend.  You may have to run a little hotter ammo until it's broke in.
5/18/2015 12:05:37 AM EDT
[#4]
thanks not areal problem just strang slide locks back with 1round left in mag.--both mags. will see what underwood ammo dose.
Quote History
Quoted:
My experience has been that Armscor is pretty week stuff.  Lock the slide back tonight and let it set all week, try it again next weekend.  You may have to run a little hotter ammo until it's broke in.
View Quote

5/18/2015 6:40:43 PM EDT
[#5]
Make sure you aren't hitting the slide stop.  I like a extended slide stop but had to remove it from my G29, but still have it on my G20L.  The G29 recoils enough more that I inadvertently engaged the stop.
5/19/2015 6:15:11 AM EDT
[#6]
What number is the follower in you magazine(s)? This is not an uncommon issue with 10mm Glocks, though the #4 follower seems to have resolved it for many.  If you have #3 or earlier followers, Glock should send you new ones if you call.  Current G20SF and G20 Gen 4 units ship with #4.