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Posted: 4/2/2022 9:30:15 AM EDT
[#1]
do they lock back on an empty mag when you run it manually?
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Posted: 4/2/2022 10:40:29 AM EDT
[#2]
Swap followers between the Swiss and Dominion mags and see what happens.
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Posted: 4/2/2022 10:58:33 AM EDT
[#3]
Quote HistoryQuoted: do they lock back on an empty mag when you run it manually? No that is how I am testing it so far. I will test fire it tomorrow. On my 550 i have to cycle it a little hard manually for it to engage but when firing it always engages. On the 551 it just doesn't. |
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Posted: 4/2/2022 10:59:04 AM EDT
[#4]
Quote HistoryQuoted: Swap followers between the Swiss and Dominion mags and see what happens. I might try that this evening when I get home. Thanks for the tip to try. |
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Posted: 4/3/2022 11:55:35 PM EDT
[#5]
Also check the mag springs and baseplate. In my case I had failures to feed and the mag was assembled incorrectly.
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Posted: 4/27/2022 4:58:44 PM EDT
[#6]
The magazine contracted the KUNG - PEW
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Posted: 4/30/2022 4:41:13 PM EDT
[#7]
Quote HistoryQuoted: The magazine contracted the KUNG - PEW Ha. What could go wrong with Chinese SIG 55x mags. |
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Posted: 4/30/2022 9:43:55 PM EDT
[#8]
Quote HistoryQuoted: Ha. What could go wrong with Chinese SIG 55x mags. They came with a 551-a1 I bought and then immediately sold after deciding to buy a Swiss 550. I kept the 2 extra mags and sold the gun for more than I bought it for. They work great in the 550 with the steel lower. They just don't lock the bolt back on the 551 with aluminum lower. I intend to swap the followers with one of my Swiss mags but I just forget. I have all sort of gun projects and sometimes forget about things. I will try tomorrow and post my results. |
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Posted: 4/30/2022 10:25:21 PM EDT
[#9]
I have a 553 with an aluminum lower and mine have worked fine. They were also new when I got them.
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Posted: 5/1/2022 1:33:53 PM EDT
[#10]
Quote HistoryQuoted: They came with a 551-a1 I bought and then immediately sold after deciding to buy a Swiss 550. I kept the 2 extra mags and sold the gun for more than I bought it for. They work great in the 550 with the steel lower. They just don't lock the bolt back on the 551 with aluminum lower. I intend to swap the followers with one of my Swiss mags but I just forget. I have all sort of gun projects and sometimes forget about things. I will try tomorrow and post my results. I have a few that came with a Swiss 551-1 LB I used to own. Rifle is gone, but I kept the mags. They are interesting. They work fine in steel and aluminum lowers for me. |
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Posted: 5/2/2022 12:01:16 AM EDT
[#11]
I guess something about the mag bodies is slightly out of spec. I tried swapping the followers. Oh well. They function other than the bolt not locking back and I have a few Swiss mags.
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Posted: 5/3/2022 11:29:17 AM EDT
[#12]
Sounds like the springs may be worn out.
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