MPA BA Chassis magazine issues

D

dbow

Private

Minuteman

Jan 6, 2018

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4

Nevada

Jul 20, 2025

#1

• Jul 20, 2025

• #1

I am having issues with an MPA long action chassis dropping the mag under recoil when rounds are in the mag. When it’s empty it stays latched just fine.

Rifle is a 300prc, using CIP+ mags. Mag latch is adjusted to have the mag just below the bolt. Not sure what to try to keep the mag securely latched.

Any advice would be much appreciated.

 

Last edited: Jul 21, 2025

ShtrRdy

Gunny Sergeant

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Sep 17, 2011

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High Plains

Jul 21, 2025

#2

• Jul 21, 2025

• #2

If you insert the magazine and then pull down on it does it come out? It sounds like the mag isn't latching in completely.

 

D

dbow

Private

Minuteman

Jan 6, 2018

27

4

Nevada

Jul 21, 2025

#3

• Jul 21, 2025

• #3

ShtrRdy said:

If you insert the magazine and then pull down on it does it come out? It sounds like the mag isn't latching in completely.

Click to expand...

It is latching when inserted. I can hear a positive click from the latch when inserting the mag. I can’t pull the mag out without releasing the mag latch

 

Last edited: Jul 21, 2025

Old Man with Gun

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Feb 4, 2019

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Jul 21, 2025

#4

• Jul 21, 2025

• #4

Any chance the mag catch is hitting something under recoil?

 

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D

dbow

Private

Minuteman

Jan 6, 2018

27

4

Nevada

Jul 21, 2025

#5

• Jul 21, 2025

• #5

Old Man with Gun said:

Any chance the mag catch is hitting something under recoil?

Click to expand...

You mean is the release hitting something under recoil?
If so, no that’s not happening. I’m shooting prone on a mat with a bipod and a rear bag. Nothing else up by the mag area.

 

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