New with Questions - Original Knight D.I.S.C

Help Support Modern Muzzleloader:

Tigdim

Member
Joined
Dec 3, 2019
Messages
6
I was recently given a Knight "original" DISC rifle by a long time friend/mentor. You can read about that in my intro thread over in the Welcome forum. ("New Wisconsin Member" is the title.)

The long and the short of it is that I want to get this thing shooting as a reminder of him and the time I spent with him in the field. After talking with a friend that hunts with a muzzleloader He is a huge Blackhorn 209 fan... He is a long time friend and serious hunter that only accepts the best in performance out of his stuff. ( Shot 1,000 yd competitions in his younger days (centerfire), avid re-loader, and built the muzzleloader he uses now because his last muzzle loader did not perform up to the level he desired.

It also looks like from reading here and other places I will have problems with Blackhorn, if I don't convert to a different bolt and breach plug. While I have read a couple different threads on converting a DISC rifle to use bare 209 primers, it seems there is some conflicting information out there. (might just be people leaving "Extreme" or "elite" off when they talk about there disc rifles.) But I want to be sure it will work before I drop $100+ on the conversion.

Knight lists a conversion on there site, but says it will need to be modified for the original disc and to call about it....(link: https://www.muzzleloaders.com/product/209-bare-primer-conversion-kit/)

I called and if I am understanding the guy correctly the lip that is at the very front of the bolt on the Disk extreme conversion bolt needs to be removed to work with the Original DISC and their breach plug.

My question is, if I want to use the Lehigh Defense breach plug (Listed for Disc elite, extreme... https://sskfirearms.lehighdefense.com/all-products?product_id=259 ) with replaceable vent plugs, will it work in the Knight original disk and the knight conversion bolt?

Would a standard Knight extreme bolt work in an Original disc with the Lehigh BP?

OR am I better off just using knights breach plug and bolt?

Anyone who has a Knight Original DISC and uses BH209... How did you get it to work consistently?

Thanks in advance for your input and information,

Aaron
 

michiganmuzzy

Supporter
Supporter
Joined
Nov 11, 2018
Messages
1,958
I have 2 original discs and changed them to the Extreme bolts and use the Lehigh breech plugs. When i ordered the bolt kit from Knight i just told them it was going into an Original Disc. They made some mod and sent it to me. I don't know exactly what they did. But it works perfectly. Then i ordered the breech plug and Extreme adapter from Lehigh. They are made specifically for the extreme bolt. Then you have to decide which brand of 209 primers you will use and shim the breech plug primer pocket to get the correct amount of crush (.003-.005). Read these instructions
https://www.modernmuzzleloader.com/threads/shimming-the-209-primer-pocket-updated-4-7-16.28388/ from a thread/stickie at the top of this "inline" section.
I never tried the BH209 before i put the Lehigh plug and adapter in. I bet it would fire fine.
 

Tigdim

Member
Joined
Dec 3, 2019
Messages
6
Extreme Adapter... I missed that part.

Thanks... I will look into it.

Aaron
 

Busta

Well-Known Member
Joined
Mar 10, 2008
Messages
2,908
My original D.I.S.C. .45 cal 1:20 works just fine with both the Extreme and Elite bolts, with no modification. This is with the Lehigh NFPJ bare primer conversion breech plug and primer adapter for the end of the bolt. I wouldn't waste my time with the Red Full Plastic Jacket beech plug that come with the Knight bolt conversion.

This is what the bolt will look like, and both types of breech plugs. These are 11 year old pictures of Knight breech plugs, before the Lehigh Version 1 and Version 2 were available.

The Lehigh breech plugs have a removable vent liner and the front (powder end) of the plug is concave instead of convex like the original Knight NFPJ breech plug pictured here.

013-3.jpg 009-3.jpg 022-2.jpg 011-4.jpg 001-2.jpg 016-1.jpg 007-5.jpg 020-3.jpg 014-3.jpg
 

GM54-120

Administrator
Staff member
ADMIN
Global Moderator
Joined
Dec 24, 2009
Messages
10,572
I tried the bare primer bolt body in my DISC Original action with a Bestill plug. Lehigh makes those for Bestill. The bolt closes into battery no problem.

If you want one cheaper and planned on the Lehigh plug anyway, you can get the bare primer body and plug for Mountaineers at Sportmans Warehouse for $85 shipped. Only the plugs are different other than cosmetics. The Mountaineer/Ulite bolt are jeweled and the knob is knurled.

Sportsmans has the Extreme conversion kits also for $130 shipped. Thats a complete Extreme bolt, FPJ plug and screw.
 

Tigdim

Member
Joined
Dec 3, 2019
Messages
6
I think your responses helped me figure the details that were still confusing me.

If you want to shoot bare 209 primers and have a Disc rifle.

If you have the bolt for the red plastic jacket... you buy the adapter and the lehigh breech plug. ($31)

If you have an original disc bolt you can get the 209 conversion kits from knight that does not require the adapter. It includes a bolt and breech plug. ($100)

In my case, since I want the replaceable vent... and knights BP doesn't have easily replaceable vents. I am going to order the Mountaineer Conversion from sportsman's warehouse. It has the bolt needed and a breech plug that is too short. ($85) Then order the lehigh BP ( $16.50)


Are the options I posted above correct?
 

GM54-120

Administrator
Staff member
ADMIN
Global Moderator
Joined
Dec 24, 2009
Messages
10,572
If you have a red plastic jacket rifle aka Extreme you only need the plug and adapter. $31 plus shipping. Good idea to buy vents at the same time to save on shipping.

DISC original can be done 2 ways but you will need the Lehigh plug with either of them. The deal at Sportsmans for a Mountaineer bare primer bolt body and plug. The Mountaineer plug is longer and wont fit a DISC or Extreme. You would have to use your bolt internals. Its not a complete bolt, just the bolt body.

So for DISC its either
$85 for the body+$16.50 for the plug and you use you internal parts (firing pin assembly)
or
$130 for a complete Exteme bolt+$16.50 for the plug+$14.50 for the adapter.

Personally i find it easier to load a primer into the adapter than the bare primer bolt but i love the look of the bare primer bolt.
 

firedawg60

Well-Known Member
Joined
Aug 1, 2010
Messages
75
If you have the original DISC bolt, call Knight and tell them you want the bolt body only, not the complete bolt assembly listed on the website, for a DISC Extreme, modified to fit an original DISC. They did that for me earlier this year for less than $70 shipped. Then get the adapter, breech plug, and as many vent liners you want from Lehighdefense.com. Use the internals from your original bolt assembly. Around $100 dollars total plus the ventliners.
 

GM54-120

Administrator
Staff member
ADMIN
Global Moderator
Joined
Dec 24, 2009
Messages
10,572
They told me it was $61ish plus shipping when i called
 

firedawg60

Well-Known Member
Joined
Aug 1, 2010
Messages
75
That sounds right. They didn't charge the high shipping as mentioned in the other thread, and it was $68 or $69 total, going from memory. The adapter and plug were $39 shipped so $108ish for everything. Unless one wants two complete assemblies, it seems to be the best way to go to get the setup preferred by most the lowest cost way.
 

michiganmuzzy

Supporter
Supporter
Joined
Nov 11, 2018
Messages
1,958
I think your responses helped me figure the details that were still confusing me.

If you want to shoot bare 209 primers and have a Disc rifle.

If you have the bolt for the red plastic jacket... you buy the adapter and the lehigh breech plug. ($31)

If you have an original disc bolt you can get the 209 conversion kits from knight that does not require the adapter. It includes a bolt and breech plug. ($100)

In my case, since I want the replaceable vent... and knights BP doesn't have easily replaceable vents. I am going to order the Mountaineer Conversion from sportsman's warehouse. It has the bolt needed and a breech plug that is too short. ($85) Then order the lehigh BP ( $16.50)


Are the options I posted above correct?
I think you are mostly correct. But, what is included in the mountaineer conversion? Is it a bare primer bolt body? Or an FPJ bolt body? Sounds like it's the bare primer body. If so then yes you are correct.
 

Boonechaser

Well-Known Member
Joined
Feb 11, 2013
Messages
109
That sounds right. They didn't charge the high shipping as mentioned in the other thread, and it was $68 or $69 total, going from memory. The adapter and plug were $39 shipped so $108ish for everything. Unless one wants two complete assemblies, it seems to be the best way to go to get the setup preferred by most the lowest cost way.
lower shipping must have been nice! I ordered a secondary safety ($5.99) because mines a little beat up and Ifound someone to Nitride the entire gun at a good price so, I wanted a new one. Anyway, that 1 ounce secondary safety cost me $15.99 for shipping, $21.98 total.

is what it is and I paid it but it’s ridiculous!
 

GM54-120

Administrator
Staff member
ADMIN
Global Moderator
Joined
Dec 24, 2009
Messages
10,572
That sounds right. They didn't charge the high shipping as mentioned in the other thread, and it was $68 or $69 total, going from memory. The adapter and plug were $39 shipped so $108ish for everything. Unless one wants two complete assemblies, it seems to be the best way to go to get the setup preferred by most the lowest cost way.
They dont even need to modify anything for the FPJ bolt body. Its already for sale as the Extreme kit. They just take one intended for the Extreme conversion kit for DISCs. That bolt is still the new machined style its just not jeweled and the knob is not knurled.

Ive used several pre knight lehigh conversions and loved everyone of them. Getting the nicer new style bolt body though is a nice touch. The old chrome ones function fine. I just like the look of machined SS better. Bare primer bolt vs the non FPJ adapter is mostly a matter of preference but it is easier to load a primer in the Lehigh adapter. It functions flawlessly for me but occasionally someone will have minor sticking issues with the bare primer body. Mine seems fine sofar.
 

firedawg60

Well-Known Member
Joined
Aug 1, 2010
Messages
75
They dont even need to modify anything for the FPJ bolt body. Its already for sale as the Extreme kit. They just take one intended for the Extreme conversion kit for DISCs.
That was my understanding from what I had read on here. All I know is two different employees at Knight told me the body had to be modified. That made me keep asking them if they were understanding which bolt I wanted. They assured me what I wanted needed modifying. When it arrived it obviously had been ground on and polished a little bit. It fits, it works and that's all that matters. If I was calling to order again I would state the intended purpose just to be safe.
 

firedawg60

Well-Known Member
Joined
Aug 1, 2010
Messages
75
lower shipping must have been nice! I ordered a secondary safety ($5.99) because mines a little beat up and Ifound someone to Nitride the entire gun at a good price so, I wanted a new one. Anyway, that 1 ounce secondary safety cost me $15.99 for shipping, $21.98 total.

is what it is and I paid it but it’s ridiculous!
Yeah, that stinks. Did you order online? Of course I called my order because what I wanted isn't on the website. Maybe that made a difference?
 

GM54-120

Administrator
Staff member
ADMIN
Global Moderator
Joined
Dec 24, 2009
Messages
10,572
That was my understanding from what I had read on here. All I know is two different employees at Knight told me the body had to be modified. That made me keep asking them if they were understanding which bolt I wanted. They assured me what I wanted needed modifying. When it arrived it obviously had been ground on and polished a little bit. It fits, it works and that's all that matters. If I was calling to order again I would state the intended purpose just to be safe.
Where did they grind and polish the body? The conversion kit is made to upgrade DISCs to Extremes it should be a drop in replacement. I have not tried a new FPJ bolt yet but im certain my bare primer Mountaineer bolt body closes just fine in a DISC with a Bestill plug. Not good enough to crush a primer though but im pretty sure it would fire.
 

firedawg60

Well-Known Member
Joined
Aug 1, 2010
Messages
75
Hard to see from the crappy cell phone pic, but I feel sure this area was ground and polished some.

IMG_20191205_174442485.jpg

I found the packing slip.

IMG_20191205_175808270.jpg
 

Boonechaser

Well-Known Member
Joined
Feb 11, 2013
Messages
109
Yeah, that stinks. Did you order online? Of course I called my order because what I wanted isn't on the website. Maybe that made a difference?
I called and spoke with Justin, I believe his name. I couldn’t find the secondary for a mountaineer on their website.
 

michiganmuzzy

Supporter
Supporter
Joined
Nov 11, 2018
Messages
1,958
When i bought one all they said was something in the rear of the body had to be machined or modified. I thought at first he meant to tell me how to do it but he said, no, they do it real quick. Didn't sound lime much and i never could tell when i put it next to an Extreme bolt. He said just mention its its for an original disc when you order it, like its no big deal.
 

gle3105

Well-Known Member
Joined
Dec 24, 2015
Messages
178
I mentioned this on another post back in October. I ordered a new bolt.
Was to be used in a “orange disc” bolt gun. Had to resize the rear of the bolt in order to fit the action.





Where did they grind and polish the body? The conversion kit is made to upgrade DISCs to Extremes it should be a drop in replacement. I have not tried a new FPJ bolt yet but im certain my bare primer Mountaineer bolt body closes just fine in a DISC with a Bestill plug. Not good enough to crush a primer though but im pretty sure it would fire.
It's probably the rear of the bolt. Slightly oversized. I had the same issue on some of mine.
Removed the firing pin .
Coated the rear of the bolt with dykem.
Saw where it was touching the metal.
This around and under the bolt handle.
Removed that area on the bolt and reassembled.
Ouila'.
Confirmed with Knight CS about this issue.
And found it was the correct action.
Newer bolt won't fit in earlier Disc rifles without this mod.
With this said a Disc Ext bolt I would think fit.
Try removing breech plug and firing pin to see if bolt will work.
Then firing pin installed less np.
Hope this helps.
 
2
Top