Knex T.C.R. 51 (Tactical Combat Rifle .51 Cal) Mk5




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Introduction: Knex T.C.R. 51 (Tactical Combat Rifle .51 Cal) Mk5

About: Hi. I've sold off about 99% of my k'nex, but I still come here to check in on instructables, every 2 weeks or so. I like seeing what's new in the k'nex, and also other sections. I may or may not post my K'n...

This is the 5th version of the T.C.R. 51 series. It is completely refined and ready for a knex war. Lets see some stats shall we?

Extremely Powerful
Very High range 60-70 ft 
Comfy Handle
Good stock
High capacity mag 15-18 rounds
Highly mobile

If not built correctly, it will get a major; almost unfix-able stoppage
Range is a little inconsistent

This is an EPIC gun, and it is ready to blow some people's heads off XD



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    good little gun you got there :)

    Thanks. =) One of my better old guns lol.

    Yup. This gun was probably the best non-removable magazine I made. Ive wanted to bring it back so many times but ended up making something else. If I ever make another yellow rod assault rifle it will have a removable mag of course and the BSAS mechanism. I already have the mag made, just gotta make the gun itself now. =)

    Magizines dont need to be removable! Yeah, building from pictures is hard. =(

    Well what I meant by "making something else" is I get a better idea and make that instead. I could easily rebuild this gun if I had to. Its just my preference to have removable mags in guns, makes it cooler; and loading times shorter.

    Yup. Might build that assault rifle once I make the upgrades to the TH2BR sitting in my room.


    What are the odds of an internal pic in one of these? I kinda need a weapon to back up my VSS Vintorez.... and this gun doesn't seem to take up too many parts, plus has nice range...

    5 replies

    It seems pretty good odds, I need time though =D


    sounds good :[)

    The stock should be easy enough to make from the pics =D


    I like stocks like the one on Mk. 1 so... I was going to add that stock to this internal... by the way... if this gun shoots yellow rods its a 5.84 X 87.09mm (or .23 cal) just throwing it out there

    omg do u post any instructions to any of ur guns cuz their sick soo cool looking

    1 reply

    Like I said, just throwing it out there... whats surprising is that it came out to be a common caliber for rifles... (not the mm one, but the fact that its .23)

    2 replies

    What is a gray connector's calibre?


    the grey one way connector? its a .31 cal... hence the reason my sidearm is called the UKP .31 (magnum round, it has a green rod connected to the grey one way) I had a forum topic about knex ammo calibers long, long ago, that I think deleted because I was completely wrong... then I looked up the actual conversions, and never posted a new forum topic with the right measurements...