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Magpul Masada (bushmaster ACR) LDD
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Ldd version of my upcoming ACR.
About this creation
Update 23-6-2010: Well, I haven't touched the ldd file fore a while. When I tried to make it, I had no time and will to make it. I also experienced some issues, mainly with the trigger pack and the bolt release. I will include them but give me time to edit them. But, I finally will make it in real life! Stay tuned!

This is my Adaptive Combat Rifle, aka Magpul Masada or the ACR. It is just an ldd model for now, but it will be built soon. It is the most advanced lego rifle I have ever created and does NOT shoot. All the features:
-85% realistic fieldstrip with the main parts:
-Handguard slides off after removing 2 pins.
-Barrel is removed when slided out
-Remove the bolt release (if you installed it)
-Remove connection between stock and upper reciever; folds like a AR-15 rifle
-slide the bolt out of the rails
-remove the pin of the stock, and slide it out
-remove one side of the fire selector en remove trigger and hammer pack.
-Very realistic looking
-Fully functional stock: collapseing and folding, with cheek rest.
-Magazine release by HeadShot
-Four-side rails for mounting optics/attachments
-triggerpack with hammer
-Working charging handle
-Working bolt release
-jSights: folding marksman sights
Note this rifle is not completley ambidextrious, but some parts are.

Now you wanna see pics, don't you :)?

All the parts. The mag will be bent.

The handguard.

The rails.

Sights. Will be replaced soon, but these can do for now...

The stock.

My very complicated trigger assembley. It was hard to make it realistic tough.

The barrel. I am very proud about this part since it is very realistic.

Well, uh, what you see here is a failed upper reciever design. I found it way to high, so i fixed it by lowering the bolt thus lowering all other upper-reciever parts (barrel, charging handle, bolt release button)

I am very proud since I worked on this 3 full days (2 hours a day, rest of my time got into my test week). I will make the gun in real life when test week is over.
For now, you can download the instructions below. Be careful tough, since it is not the complete bolt release/mag release so you have to use your own creativity to make it. Some moving parts may not work but this will be fixed when I made the real gun. I will also post a video how to field strip, since it can be confusing and different then the real one tough.

Comment and have fun building!

Building instructions
Download building instructions (LEGO Digital Designer)


 I like it 
  November 8, 2012
Please send instructions to Thanks. 4/5
 I like it 
  August 31, 2011
Looks 5/5 Features 4/5 Construction 3/5 Overall 4/5 The reason I gave this a 4/5 is because of it's strength. I did infact build this with real bricks and parts of it were very weak, though I was expected with the complexity of the internals. Great build though. :)
 I like it 
  February 14, 2011
WOW!!!!I liked it!100/5!!!!!do you mind sending instructions to can't open the file on my computer. Thanks!!!
 I like it 
  February 12, 2011
this is amazing! best gun i have ever seen in my life! i am so glad you let people download the instructions cause this is incredible. thax so much!
 I like it 
  November 30, 2010
THANK YOU!!!!! epic gun, have been searching forever for an acr ldd file!!! Fantastic design!!!! love it!
 I like it 
  November 13, 2010
wow thare is realy epic gun love all ,any why can you comment an my creations if you can I would really be happy tnx
 I like it 
  October 29, 2010
Wacht maar tot mijn Nambu komt! Ik ben een nieuwe serie aan het maken, Pistols of WWII! -Jan
 I like it 
  July 9, 2010
Wat een mooi ding! Ziet er erg goed uit! Kijk ook ff bij mijn wapens als je wilt :D -Jan
Jurrien Meyrahn
 I like it 
Jasper Jasper
  April 5, 2010
jo vet dat je het zo in LDD kan maken. Ik kan niet wachten op de release
 I like it 
  April 5, 2010
Het ziet er wel heel goed uit in LDD. Ik kan niet wachten tot we het in het echt zien(want dan zal het wel nog beter zijn).
 I like it 
  April 3, 2010
Nice, hey check out mine see what u think
 I like it 
  March 29, 2010
I like it because there is so much detail, but it also looks really good. It's pretty hard to make something look good, but even harder to make it functional. You did both.
 I made it 
  March 29, 2010
Quoting Commander Thorn Amazing! This is the best Lego gun I have ever seen! Do you want to be friends?
Yeah shure! Thanks for the great response! Why do you think it is so good? Just wanna know :)
 I like it 
  March 28, 2010
Amazing! This is the best Lego gun I have ever seen! Do you want to be friends?
 I like it 
  March 28, 2010
Awesome ACR!
 I like it 
  March 27, 2010
:O nice ACR
By Jurrien Meyrahn
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