A400 Wear Parts

jml · **Joined:** Fri Jun 06, 2003 9:02 pm **Posts:** 380

One shoot and I’ve torn up the recoil spring sleeve, which is cheap plastic piece....

What are some other wear parts for the A400?........

Thanks

oneounceload · **Joined:** Tue Jan 08, 2008 6:20 pm **Posts:** 22940

How did you do that? I have thousands and thousands through my A400 and the only thing I have replaced is the main recoil spring inside that sleeve.

Denver1911 · **Posted:** Mon Jan 11, 2021 6:55 am

I’ve got just over 50k on 2 different A400s. One the Xcel and one the Xplor Action. I took the Xcel apart a couple weeks back. I mean APART. The only parts I left assembled were the trigger group (except hammer spring), extractor, gas valve, beads, and I left the mag tube attached to the receiver. After cleaning it all with degreaser, these are my observations:

1. Breech bolt pin chrome flaking and deformed
2. Ejector seemed to be wearing (tip slightly deformed)
3. Receiver had some dents in the back
4. LOTS of finish wear although probably not abnormal for this amount of usage
5. Magazine spring rusting more than just surface.

I replaced the following as preventative:

1. Recoil spring
2. Magazine spring
3. Hammer spring
4. Ejector spring
5. Firing pin spring
6. Breech bolt pin.

I was not experiencing any failures except for those when using low pressure shells when it was cold and when it had not been cleaned in over 5,000 rounds .. i.e., expected failures.

I did, however, discover a crack in the stock on top of the grip where it meets the receiver. This is quite likely from never having replaced the recoil spring in 50k rounds. Lesson learned. I won’t likely re replacing them every 5k as someone suggested, but maybe once a year (10k-15k).

I am FAR from an expert on semi-auto shotguns, so I look forward to more replies to see if I missed anything I should have replaced. I plan to do the same for the Xplor Action soon.

jml · **Joined:** Fri Jun 06, 2003 9:02 pm **Posts:** 380

oneounceload wrote:

How did you do that? I have thousands and thousands through my A400 and the only thing I have replaced is the main recoil spring inside that sleeve.

Not sure how it happened. But I’ve got a new sleeve on the way..

jml · **Joined:** Fri Jun 06, 2003 9:02 pm **Posts:** 380

Denver1911 wrote:

I’ve got just over 50k on 2 different A400s. One the Xcel and one the Xplor Action. I took the Xcel apart a couple weeks back. I mean APART. The only parts I left assembled were the trigger group (except hammer spring), extractor, gas valve, beads, and I left the mag tube attached to the receiver. After cleaning it all with degreaser, these are my observations:

1. Breech bolt pin chrome flaking and deformed
2. Ejector seemed to be wearing (tip slightly deformed)
3. Receiver had some dents in the back
4. LOTS of finish wear although probably not abnormal for this amount of usage
5. Magazine spring rusting more than just surface.

I replaced the following as preventative:

1. Recoil spring
2. Magazine spring
3. Hammer spring
4. Ejector spring
5. Firing pin spring
6. Breech bolt pin.

I was not experiencing any failures except for those when using low pressure shells when it was cold and when it had not been cleaned in over 5,000 rounds .. i.e., expected failures.

I did, however, discover a crack in the stock on top of the grip where it meets the receiver. This is quite likely from never having replaced the recoil spring in 50k rounds. Lesson learned. I won’t likely re replacing them every 5k as someone suggested, but maybe once a year (10k-15k).

I am FAR from an expert on semi-auto shotguns, so I look forward to more replies to see if I missed anything I should have replaced. I plan to do the same for the Xplor Action soon.

Thanks Denver for sharing!

A400 Wear Parts

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