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Rimfire Firearms .22, .17 and other Rimfire Handguns and Rifles

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  #1  
Old 07-12-2013, 5:45 PM
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Default F2000 Conversion - Defcon Inspired

After seeing Defcons conversions (and being tired of building expensive AR-15s) I decided to have a little fun of my own. So I took a Marlin Model 60 and a G&G F2000 Airsoft body and made a 7.5 pound bullpup.

I bought the G&G body for $150 and sold the guts for $40 on ebay. The Marlin has a 19" barrel and the final product is 27" long. The build took eight evenings, couple hours each evening, to complete.
Attached Images
File Type: jpg Start.jpg (86.9 KB, 287 views)
File Type: jpg Finished.jpg (70.3 KB, 293 views)

Last edited by mshill; 07-12-2013 at 5:48 PM..
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  #2  
Old 07-12-2013, 5:46 PM
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Default Build Process

The G&G F2000 Airsoft body is sturdily built and weighs hefty 4 lbs and is made of thick plastic and held together by no fewer than 18 hex bolts/nuts. The barrel cover (with attached all metal picatiny rail) slide off (see Rail.jpg) afterwhich the handguard drops off the bottom.

Because of the tube magazine of the Marlin 60, I decided that the each half of the handguarf and barrel cover would have to be attached to the respictive half the body (see Handguard.jpg)

The original trigger linkage was too short and way to high to adapt for the Marlin 60 trigger location. So it got removed and relocated to the opposite side of the body.

If a Marlin 795 were used, the barrel covers would not need to be modified and could have remained removable (although I don't know why it would be needed). A 1/2" diamater channel needed to be routed in the very bottom edge of the barrel covers to accomodate the tube magazine. For this I used my brother-in-laws routing table. It actually went perfect on the first one. The second one needed a 1/4" z-axis offset because it is not syntetrical in the front where the metal rail attaches.

Before bedding the action/barrel the opening at the rear of the barrel guards had to be opened up from 1/2" diameter to 3/4" and the top of it slotted to accomodate the stock rear sight of the Marlin 60. The bedding in that area actually provided a good indexing point in the horizontal plane.

I initially bedded (see Bedding.jpg) the barrel and action with JB Weld Plastic Putty, which I like because it lets you work for 15-20 minutes before it starts setting up. I bedded the front of the barrel, back of the barrel, and three spots around the action (two bottom, one top).

I was at Home Depot and saw the stack of orange 5 gallon buckets with a nice 1/8" metal handle (I have like a dozen at home) so I thought I would expirement with them. Well, with a vice, some channel pliers, and a few solid pops with a hammer I was able to straighten one out and then form it appropriately. Not liking the round about routing of the original airsoft linkage, I rerouted it on the opposite side of the body (see Rerouted.jpg). The rerouting consisted of cutting about five channels in ribs on the body.

Before finalizing the linkage I had to stabilize the Marlin trigger guard assembly. At Home Depot I got a 1/2" spacer for the rear trigger guard bolt that fit perfectly. but left the trigger guard assembly a little loose. I dropped down a blob of JB weld on either side of the rear of the trigger guard (see Action.jpg). After the trigger guard was stabilized I made the final bend in the linkage rod and covered it with some cloth tape.

I had to solve a couple of issues:

First, my model 60 has the bolt hold open function. I didn't want to cut a hole in the body to get to it so I disabled it by reforming a spring (AR15 dust cover spring) and connecting it to the action holding the bolt release back so it could not engage. Worked perfectly.

Second, because I rerouted the trigger linkage more directly, I could not push the magazine all the way in because the trigger linkage rod was in the way. So I just cut a 1/4" wide, 1/4" deep channel off the side of the airsoft magazine (not the mag catch side). Problem solved.

I cut the ejection port and finished it off with a dremmel drum sanding bit (fit perfectly and made it very easy).

The only issue I have is that I need to extend the charge handle to make charging more comfortable.
Attached Images
File Type: jpg Rail.jpg (80.0 KB, 104 views)
File Type: jpg Handguard.jpg (94.5 KB, 101 views)
File Type: jpg Bedding.jpg (57.4 KB, 106 views)
File Type: jpg Rerouted.jpg (92.1 KB, 107 views)
File Type: jpg Action.jpg (95.0 KB, 114 views)

Last edited by mshill; 07-12-2013 at 9:22 PM..
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  #3  
Old 07-12-2013, 5:46 PM
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Took it to my dads today for a test drive. No video cause I forgot my camera and my daughter left her phone at home.

I zeroed the BSA Red Dot at 25 yds in nine shots. I can shoot half dollar size groups off hand without a problem. It ran perfectly, no movement, held zero through about 200 rounds.

I had two minor issues... Had to really pay attention when loading the model 60 to make sure I didn't put more than 14 in the tube, and I had a couple spent shells end up inside the air soft body through the gap between the ejection port and the airsoft body.

Some quotes:
My daughter': "That was the funniest thing to shoot.".
My wife: "That's really cool."
My nephew: "That is now my favorite gun."
My dad: "You need to take it to hunt rabbits in Utah, that would be a blast"

I loved it. Lots of fun. But there is still something to be said about the power of an AR or AK.

Last edited by mshill; 07-19-2013 at 10:10 PM..
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  #4  
Old 07-12-2013, 7:26 PM
defcon defcon is offline
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interdasting. great job man!


pics of trigger linkage and bedding please

i have the FN tri rail for this. ill need to pick up teh G&G version and do another one with the Marlin 60

Last edited by defcon; 07-12-2013 at 7:35 PM..
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  #5  
Old 07-12-2013, 7:28 PM
Mizouse Mizouse is offline
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nice!
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  #6  
Old 07-12-2013, 7:30 PM
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That sweet. No DIY step by step? Lol
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  #7  
Old 07-12-2013, 7:31 PM
defcon defcon is offline
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hosted it for you

Start by 79522LR, on Flickr


Finished by 79522LR, on Flickr
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  #8  
Old 07-12-2013, 9:19 PM
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Quote:
Originally Posted by toyotech View Post
That sweet. No DIY step by step? Lol
See post #2.

I went and picked up a cheap Red Dot for it. I now have $280 into this project (including the Marlin 60). My daughter thinks its totally cool. It certainly isn't my dad's .22.
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  #9  
Old 07-12-2013, 9:28 PM
defcon defcon is offline
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Rail1 by 79522LR, on Flickr


Handguard by 79522LR, on Flickr


Bedding by 79522LR, on Flickr


Rerouted by 79522LR, on Flickr


Action by 79522LR, on Flickr
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  #10  
Old 07-12-2013, 9:34 PM
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you need a 10/22 flash hider

you will have to dremel off the bottom part of the 10/22 flash hider so it can slide over the Marlin 60 tube
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Old 07-12-2013, 9:39 PM
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thanks and that is really cool.. wonder why companies dont make 22s like what you and some others i have seen make
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Old 07-12-2013, 9:43 PM
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Quote:
Originally Posted by toyotech View Post
thanks and that is really cool.. wonder why companies dont make 22s like what you and some others i have seen make
i wondered the same thing 2 years ago. then i got tired of waiting and just took it into my own hands and started dremeling and epoxying.

it gets pretty easier when after doing 1-2 conversions. usually it takes 8-10 hours and then you reduce that time down to 3-5 hours after doing a couple
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Old 07-12-2013, 9:52 PM
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i wouldnt know where to even start. im pretty mechanically incline but without seeing one done in person. i think it be kinda hard for me to try on my own. i prefer a supervisor lol.
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Old 07-12-2013, 9:57 PM
defcon defcon is offline
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Quote:
Originally Posted by toyotech View Post
i wouldnt know where to even start. im pretty mechanically incline but without seeing one done in person. i think it be kinda hard for me to try on my own. i prefer a supervisor lol.
talk to me or mshill for some guidance
ill tell you what .22 will work with what stock
it first starts by picking out a centerfire clone you want to work with.
then go on your local craigslist and look around for broken/used one for under $100-$150
then buy a $25 dremel, JB Weld and Devcon epoxy putty at home depot/lowes.
then start cutting it up until your .22 action/barrel fits comfortably


again it takes 8-10 hours total. 1-2 hours a day until you finish your 1st conversion
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Old 07-12-2013, 10:00 PM
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Quote:
Originally Posted by toyotech View Post
thanks and that is really cool.. wonder why companies dont make 22s like what you and some others i have seen make
Quote:
Originally Posted by defcon View Post
i wondered the same thing 2 years ago. then i got tired of waiting and just took it into my own hands and started dremeling and epoxying.

it gets pretty easier when after doing 1-2 conversions. usually it takes 8-10 hours and then you reduce that time down to 3-5 hours after doing a couple
Being set in their ways, the manufacturers are missing out on an emerging market. I am 50+ years old and don't get all excited about myfathers 30-06, lever action winchester, or classic 1919 LC Smith double barrel shotgun. But put a Tavor, FS2000 or Steyr AUG in my hands and it is a whole different story.

My next project will likely be a Tavor or an L85/SA80. I built 4 ARs for my kids, now it looks like I'll be doing some fun guns for them as well.
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Old 07-12-2013, 10:10 PM
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Quote:
Originally Posted by toyotech View Post
i wouldnt know where to even start. im pretty mechanically incline but without seeing one done in person. i think it be kinda hard for me to try on my own. i prefer a supervisor lol.
While I am an engineer by trade, I have never shy'd away from a challenge. This one turned out to be quite a bit easier than I expected.

I like the Marlin 60 because you don't have to deal with figuring out how to do the magazine release. The flip side is that you have to make a channel for the tube magazine.

You could start with a cheap P90 for less than $50. If it doesn't work out , you won't be out much.
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Old 07-16-2013, 7:54 PM
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wow thanks for the tips and help when i needed. i def will be pm you guys if i ever decide to take on a project like this. the F2000 conversion didnt look to hard. still waiting for this whole gun stuff to settle down. its still a buying frenzy out there with overpriced everything. just been shooting what i have till than haha
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Old 07-17-2013, 1:09 PM
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Quote:
Originally Posted by toyotech View Post
wow thanks for the tips and help when i needed. i def will be pm you guys if i ever decide to take on a project like this. the F2000 conversion didnt look to hard. still waiting for this whole gun stuff to settle down. its still a buying frenzy out there with overpriced everything. just been shooting what i have till than haha
The buying frenzy will continue here in beautiful CA until the first of the year when long gun registration kicks in and maybe some really bad new laws ala SB374, SB47.
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Old 07-17-2013, 5:13 PM
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i really dont wanna have to reg a 22 lol. what are some must have 22 i should have? i already have a mp15-22 love this thing
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Old 07-17-2013, 5:31 PM
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I have to say the two marlin 60s that I have shot have been really accurate rifles.. My dad's is older with a 22" barrel and wood stock, very solid for an old beater rifle. The one I bought for this conversion was incredible out of the box. My wife was complaining that I took a perfectly good, light, accurate rifle and made it heavy and weird looking.(went from 4.5 lbs to 7.5 lbs bullpup).
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Old 07-17-2013, 5:33 PM
defcon defcon is offline
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i got my used marlin 60's and glenfield 60's for $75-$100 a piece plus DROS/shipping
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Old 07-17-2013, 6:18 PM
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How is something like this cleaned?
Is the action and barrel still easy to take out?
I guess what I'm asking is if the JB Weld and epoxy are holding the parts or just holding them into position?

How's trigger?

I've wanted a F2000 since I first saw one, something tells me I'll be looking for a used Marlin 60 soon!

Thanks mshill and defcon
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Old 07-17-2013, 7:49 PM
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Quote:
Originally Posted by DPmax View Post
How is something like this cleaned?
Is the action and barrel still easy to take out?
I guess what I'm asking is if the JB Weld and epoxy are holding the parts or just holding them into position?

How's trigger?

I've wanted a F2000 since I first saw one, something tells me I'll be looking for a used Marlin 60 soon!

Thanks mshill and defcon
should take 7-10 minutes to disassemble depending on how fast you can unscrew the bolts
action/barrel is easy to take out
JB Weld and epoxy putty are used to help create a skeleton around the action/barrel to prevent movement.

i typically use an extended screw that goes through the buffer as an added measure

trigger isnt typically crisp because of the linking steel rod. thats the sacrifice we'd have to make when making something like this.

you can always add thicker nylon spacers to the rod to get it closer to the trigger
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Old 07-17-2013, 8:12 PM
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nice job! mishill!

giving the teacher Defcon some mad competition for these 22 master piece's
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Old 07-17-2013, 11:17 PM
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Quote:
Originally Posted by DPmax View Post
How is something like this cleaned?
Is the action and barrel still easy to take out?
I guess what I'm asking is if the JB Weld and epoxy are holding the parts or just holding them into position?

How's trigger?
With the FS2000 there are like a dozen bolt/nut pairs to take out. Once opened the action/barrel just lifts out.

The epoxy putty just holds everything in place to keep it from moving.

I got my trigger to be very tight and any take up is only from the Marlin 60 trigger. The straighter the linkage the crisper it will be.
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Old 07-17-2013, 11:29 PM
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Originally Posted by santamonica9 View Post
nice job! mishill!

giving the teacher Defcon some mad competition for these 22 master piece's
Thanks. Defcon is on a whole different level when it comes to this stuff. I was just fortunate enough to come across a used FS2000 air soft body, and it turned out to be a real good body for a first project. It has really good plastic and lots of room to work.

Looking forward to doing Famas, Tavor, APS UAR, and maybe a cheap P90 (not necessarily in that order).
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Old 07-18-2013, 5:20 AM
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good job. thanks for the pictorial too.
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