Picture of SR70A1 PSRS
SR70A1 Precision Sniper Rifle System. Great range, accurate, powerful, versatile, you name it.
It is a ramrod rifle. It uses #64 rubber bands, and looks great.

Also, I have now made a folding bipod for this gun. Now all I need is a hammer/firing pin guide because at 5+ bands, the black rod begins to bend and break. In other words, I need something like the Z35's guide.

Ramrod rifle
No jams if made correctly
Easy-detach scope and barrels
Smooth True Trigger
Fires any rod
No mags
Any accessory can be attached
Lefty support
Scope with dot sight; accurate.

May be too small for some people
No mags
Grip may be uncomfortable for big hands
Barrel can droop, but fixed by a rubber band.
Well...that's all I can think of.

-------------------------------------------Notes from the Author--------------------------------------------
Sorry folks, I'm afraid this will be my last work uploaded. This gun, along with the ible, will be an open source for inspiration, upgrades, and new models for the K'nex builders that will follow.

I, Prodo123, hereby grant the right of usage of this Instructable to every individual. I also grant the right to use the name "SR70", "SR70A1", "SR70A1 PSRS", "SR70A2", and "SR70A2 PSRS" to every individual whom has upgraded and/or modified this gun. I hereby grant the permission of modification, reproduction, reconstruction, and deviation of this gun, Instructable, name, and video to every individual who does so, for as long as they give credit to the source. I hereby permit the use of this Instructable as inspiration and without credit to every persons interested. Those who do not comply with this permission grant will be reported and/or dishonored, and is not limited to a ban, a suspension, and/or the deletion of the Instructable. I, Prodo123, grant all of these rights, and the consequences that follow, to all individuals.

Long story short, you may use this Instructable to modify your SR70A1 PSRS, SR70, or create a new model/variation of the gun, for as long as you give me, Prodo123, credit.

Also, you may use this Instructable as inspiration, and you may do so without giving me credit (If you do give me credit, I give you a cookie :3)

It's been a good time here at I'll hang around, but sorry, no more K'nex for me.
Remove these adsRemove these ads by Signing Up
1-40 of 102Next »
kingofknex4 years ago if you are having trouble use the old one it exactly the same :)
prodo123 (author)  kingofknex4 years ago
Also, they're not the same. They're radically different.
If you ignore my comments, then I promise you your gun will be raining w/ broken pieces.
prodo123 (author)  kingofknex4 years ago
juneapaluna4 years ago
prodo123 (author)  juneapaluna4 years ago
My pieces are too tight so i just used mini knex rods as ammo. Now the rang is so:
huh i don't get it can someone help me :c ?
This is a GREAT gun but could you make a video on how to make it the pictures are just not enough.
Smasher5554 years ago
I built this a month ago. But the barrel is too high friction. My bullets wont even come out of the barrel. I figured out a way to reduce the friction in a barrel. First, take a drill and one your pieces. Then run the bit around the hole of the piece to make the hole slightly bigger. Ta-da!
yeah mate i did the same, you have to loosen or stretch out the grey connector so its looser if you have a newer knex set thats probably why
prodo123 (author)  Smasher5554 years ago
what the heck??? you built it wrong. my barrel's so low friction, bullets fall out if you tip it down.
Sorry, my pieces' holes must be smaller. I haven't built a gun that works before that has that kind of barrel. A few days ago I built a gun with a zero friction barrel with the Z35 rear barrel, mag,and the SR70A1 PSRS trigger and scope. It shot about 10 ft : (
prodo123 (author)  Smasher5554 years ago
yep, looks like either you used micro k'nex or you built it wrong
I don't use damn "micro k'nex", i dont know what the hell is wrong with me and my pieces!!! !
prodo123 (author)  Smasher5554 years ago
Probably metric problems, then. I needed a 3.5mm plug for my headphones, bought an 1/8" plug, and it ended up not fitting.
Dude guess what? I built this again and it WORKS! But the only problem is, I think I dry fired it, I had a second transfer rod behind the original ( red rod ), the grey one shot through the gray clip, then the red rod went into the gray clip!!! Any way to fix it?!
prodo123 (author)  Smasher5554 years ago
Take off the rubber bands, hammer, and the scope. Undo the barrel support that's directly below the hammer. Then, pull the entire barrel off the stock. Disassemble the barrel from the muzzl (This might take a lot of effort) and replace the broken pieces. Reassemble the barrel, and follow the instructables on how to reassemble.

Please, try not to dry fire. It's really bad for any projectile weapons, including firearm, bows, slingshots, etc.
The piece actually not broken, but I fixed it an easier way. I just took off a blue that held the grey clip that holds the transfer rod. And also, I kind of screwed it up by building it wrong so I had to add a red rod and a yellow rod.
I use the old pieces, but still they should be made correctly.
knexsim3 years ago
lol i built it and shot it then reloded the it snaped it slef into 3 pices plzz explanin cba rebuilding but still would like to know y it did that
great gun but i cant work out how to attach the part with the grey rod down the middle to the rest of it. 5/5 so far btw
don't worry- fixed it + finished it
money19963 years ago
he nice gun
but how many white or black connectors do you REALLY need (that you cant replace for a blue connector)

prodo123 (author)  money19963 years ago
I haven't counted, because I modified the gun to be so rock solid that I can't take it apart...

But the point is, the gun depends on the hole in the middle of the white connectors to function. That's what makes up the barrel of the gun. If you replace them with blue connectors, you'll be blocking the barrel.
So, you really shouldn't replace ANY of the white connectors with blue connectors. The only white connector I see that can be replaced without compromising safety and performance would be the ones on the faceguard/stock.
mberg4 years ago
on the eleventh pic starting from the right, whats that black thing
i think it is half a ball joint but i cant see it very clear
prodo123 (author)  kingofknex4 years ago
NO. No ball joints in the barrel, EVER. This will break it, no exceptions.

Sorry, Firefox, Chrome and IE9 are all malfunctioning at once. Can't add notes.

That would be a gray connector. DO NOT USE THE OLD ONE FOR ANY REASONS. IT WILL SHATTER THIS CONNECTOR. This gray connector has been covered with electrical tape on the SIDES (not the faces, where there's holes and make the connector thicker). The tape should be applied after the gray rod has been clipped onto it, and it should reach around the clip.
kingofknex4 years ago
can anyone who has built this please help me out and post another pic on part 3 pic 11 because it so blury i cant see
(removed by author or community request)
prodo123 (author)  DELETED_Bobbienator4 years ago
There is no red rod in the faceguard. The faceguard is the small platform popping out behind the scope.
(removed by author or community request)
prodo123 (author)  DELETED_Bobbienator4 years ago
Oh, oops sorry about that. I'm fixing it right now.
Furloy4 years ago
even though you guit knex awhile ago how you did it is stupid. you make it seem like its sooo dramatic but really no offense, you never made anything too good. sorry, later.
mberg4 years ago
(removed by author or community request)
(removed by author or community request)
prodo123 (author)  DELETED_Blue Mullet4 years ago
I hate those square guns. Makes guns look blocky (perfect for Glocks). Rifles and real barrels have a circular barrel, not some square blob with a hole on it. This is as close as you can get to a circular barrel.
dansdoc4 years ago
does any one have a peice count (i wish every gun had one)
1-40 of 102Next »