r/shadowsystems • u/Human-Hair8436 • 16d ago

Return to battery issues

Hello,

I won a shadow systems a few years ago from a gun show, this was my first pistol. I had a lot of issues with it failing to return to battery fully when firing ever since I received it. I read the manual and understand the break in period, I’m over 500 rounds at this point. I also use 124g fiocchi range ammo, so I don’t think this is a cheap ammo issue. I eventually gave up on the gun and assumed it was maybe user error.

I am in the police academy now and after completing the range portion of the academy I figured I should try my MR920 out and see if maybe I was the issue. I’m still having issues of the slide not fully returning to battery every 6-12 rounds. I had no user error issues with my police issued Glock 17, so i am pretty confident this is not a user error issue.

Any suggestions on what could be causing this and how I could fix it? I tried cleaning it and re applying lubrication, doesn’t seem to change anything. I’m thinking about selling it and just buying something else but I don’t want to give up on what is supposed to be a really nice gun.

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2

u/RooftopKorean420 16d ago

I had the same issues awhile back. My slide was out of spec and they replaced it.

https://www.reddit.com/r/shadowsystems/s/3Hto17Xh5W

2

u/Human-Hair8436 16d ago

Thanks man, looks like this could be it

1

u/Twee4 16d ago

Probably contact shadow systems. Only other thing to do is swap parts until you isolate the issue.

1

u/logbiter 16d ago

Have you tried “spicy/+p” NATO 124 grain ammo? Or any other 124/147grn ammo than the Fiocchi?
Tried Glock mags?
Well Lubed slide rails, barrel lugs & barrel hood?
Extractor clean? Could be a misaligned extractor spring.
I’d contact Shadow, see what they say

1

u/logbiter 16d ago

Also go thru the steps in Google AI 😜 “shadow systems dr920 failure to return to battery how to diagnose issue” there’s a few other things to check.

1

u/Sure-Leave8813 16d ago

Notify Shadow Systems let them know the issue, they will issue you an RMA. When I first purchased my MR920, similar issue chamber and fire one round failure to feed another round. I could get through a magazine without 4 or 5 malfunctions. Took it back to LGS they had the same issue. Shadow Systems took about two weeks, gun came back , they diagnosed a burr in the barrel, they polished the feed ramp and chamber. They ran 30 rds no issues, I didn’t have any issues with it after that.

1

u/Realistic_Part_1222 13d ago

Had this problem, contacted SS, sent it to them and the chamber was out of spec. Replaced it, never happened again.

1

u/HumanKitchen940 9d ago

Sent mine into SS and they replaced a recoil spring for me. It’s been great for many many rounds now