This is the RPA 50 with the .50 BMG rounds sniper.
It was easy to build, it has some nice features and its very accurate.
THERE ARE NO INSTRUCTIONS FOR THIS GUN AVAILABLE.
About this creation
Left side.
Right side.
Another time the right side.
Charging.
Charged.
Middle reciever.
Pistolgrip.
Bipod unfolded.
Bipod folded.
Muzzle Break.
FPS view.
Looking trough the scope.
Looking trough the ironsights above the scope.
Looking trough the ironsights.
The scope.
The upper rail.
The scope mounted on the upper rail.
The front rail (also at the other side).
The 'feet' at the stock.
How to change it.
You can always change the hight of the 'feet'.
The 2 magazines.
Whole mechanism.
The magazine mechamism how it stay in its place.
Mechanism, magazine is in.
How to attach the bipod.
Bipod attached.
Charging handle backwards.
Here you can see the hammer.
Trigger Mechanism.
Trigger Pulled In.
The little L beam that pulls the hammer backwards when charging.
i think in your next build you should use the mech from Jack Streat's Jungle Carbine from his book, Lego Heavy Weapons. instead of the hammer's rubber bands being attatched to the barrel assembly, those rubber bands are attatched to the bolt assembly. EDIT: maybe use it on a assault rifle?