

This spring fits the Excess Arms +5 Mag extension for the PSA Micro Dagger. The Magazine Spring is wound from high strength Music Wire to ensure unparalleled reliability without needlessly increasing loading force.
Reviews
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But these springs to upgrade PSA & Shield Arms!
I bought these as an alternative to what Shield offers in their +5 mag extension in regards to springs. The EA springs are much more robust and are longer and have more pressure when installed. These fixed my issue right up with feeding that a lot of us 43x owners complain about with the Shield mags! I would recommend trying their +5 extension kit for the PSA Micro Dagger mags as well! If you have shield mags, ditch them and KEEP the followers and run them on the EA springs with their +5 extension and the PSA mag! Also, the metal mag release WILL NOT chew your poly PSA mags up! It will make a nice little home and channel just a bit, but the engagement notch on the mag is very robust and the metal Shield Arms mag release will simply just fall Into the notch not causing any problem what so ever. Shield continues to fail with even a Gen 3 mag...but Excess Arms and build up the PSA mags! You won't regret it! This is the FIX! Note: if you want to run Shield Arms extensions you may already have on your PSA Micro Dagger mags yiu can, you just have to shave off the front alignment/reference notch/lips on the bottom-front of the magazine and then secure it as Shield Arms intended. This will work as well if you don't want to throw away your SA extensions! Just use EA springs and the Shield followers and then buy more PSA and EA mag combos!!