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Firebird 15 Round Magazine Assembly - DIY


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Thanks to Jim's 6 part DIY tutorial on YouTube, the build using Firebird Precision's F-15 Adapter is fairly straight forward.

 

On part 3, Jim explains that .040" to .070" needs to be milled from the front of the stock MKA 1919 followers to give enough clearance that it will not hang up in the finished magazine.

 

My question is how are fellow DIY'ers trimming their followers?

 

I do not have a mill but I do have lots of coarse sandpaper and a few good files. Unless someone has a better idea, that's how I will proceed.

 

So how did you trim your follower?

 

Thanks.

 

Bill

 

 

 

 

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I just did my F15 set up last night. Thank you Jim for the awesome product and videos.

 

When I did my followers, I used a mic to see how thick the end was. It came in right around .120 + - .005. To "mill" it down I used a 5" sticky backed 120grit sanding disc stook to a flat surface. Much like Jim did in the video to face the saiga mag after you cut it. I took mine down to .070 and it was able to past thru the coupler. It's a little tight yet but I feel it's fine for me

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I just did my F15 set up last night. Thank you Jim for the awesome product and videos.

 

When I did my followers, I used a mic to see how thick the end was. It came in right around .120 + - .005. To "mill" it down I used a 5" sticky backed 120grit sanding disc stook to a flat surface. Much like Jim did in the video to face the saiga mag after you cut it. I took mine down to .070 and it was able to past thru the coupler. It's a little tight yet but I feel it's fine for me

 

 

Good to hear. I'm sitting in front of the computer doing the same with an 8-1/2" x 11" piece of coarse 60 grit sandpaper. When I get it a little closer to my target I will switch to 220 grit.

 

Thanks.

 

Bill

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I'm at the point where it needs to go to the range. I took a little over .070 off the follower. Loading shells is tough right at shell number 8. All others load just fine. Pushing the shells from the magazine and all shells seem to come out smoothly. Better to range check it than take off a little too much.

 

Bill

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I'm at the point where it needs to go to the range. I took a little over .070 off the follower. Loading shells is tough right at shell number 8. All others load just fine.

 

If you think you took off too much... for something like a follower, just build it back up again with something like a *good* epoxy, or Gorilla Glue, Don't use too much. Let it harden for a day or two, then file/sand and do it right this time. Should be fine. Just a thought.

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Anyone know where the 5 rounders with the new follower are for sale?

 

The only ones I've seen in stock are the camo version 5 rd mags at Centerfire.

 

http://centerfiresystems.com/MAG-MKA-5CAMO.aspx

 

Arms of America shows them but does not indicate if they are in stock.

 

http://armsofamerica.com/mka191912gasemi-autoshotgun3magazine-1.aspx

Edited by Flatland Shooter
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My two F15 mags ran great on Walmart bunk. Very happy with the kit. Now I have to work on the Salem 6 ext.

 

Still trying to get mine figured out. I've got all the parts for four 15 rd magazines but plan on doing them one at a time. As soon as I get one running 100%, then I go to the next. I'm still on the first.

 

I tried the new magazine with several brands of ammo and it consistently will not feed the 1st round. It goes straight into the ramp and stops. Download from 15 rds to 14 rds and it runs great with everything I put in it. When it was still a stock 5 rd magazine, it ran great.

 

I'm sure it is something simple and I will figure it out. My next step will be to watch Jim's YouTube video again (the one on magazine tuning) and see if there is something I missed.

 

A friend at the range suggested I get a spring from a 20 rd Saiga magazine and see if that helps. Just one more option to try.

 

Bill

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It goes straight into the ramp and stops.

 

Bill

 

Do you by chance have our ARR ramp?

No sir. My MKA 1919 is one of the Firebird 922 compliant guns sold through Centerfire.

 

When that first round hits the feed ramp it is perfectly parallel to the axis of the barrel. Since I only have one side of the Saiga magazine taped, I pulled the magazine apart and put the 5 round spring and baseplate back on. It feeds all five rounds perfectly.

 

I need to adjust the feed lips to where that first round slides upward just a little bit with the 15 rd parts in place.

 

Bill

 

 

Is ur 15th round seating all the way back in the mag when loaded? I noticed when loading the las round, not every time it would seat to the back of the mag.

 

 

 

I do not know if it sets all the way back all the time, but here at the house, using dummy rounds, the first round is all the way to the back and it still goes straight into the feed ramp.

 

I just need to do a little tweaking and it will run. Patience is a virtue.

 

Bill

Edited by Flatland Shooter
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