RokStok

[ckt3]

I have an 18" PVA .750 Taperless on mine. Balance is OK with the Hydrogen K but noticeably better with the OG.

OG pulls the balance point forward a bit?

 

[bpitcher]

OG pulls the balance point forward a bit?

To the rear - closer to the mag.

 

[wind gypsy]

I got red snake AICS bottom metal for one of my rokstoks.. I’m a bit gunshy to take the dremel to the stock. Anyone got pictures of something similar after doing the work?

 

[43.6N]

I got red snake AICS bottom metal for one of my rokstoks.. I’m a bit gunshy to take the dremel to it. Anyone got pictures of something similar after doing the work?

I dremeled the stock, not the bottom metal. Then used bedding compound to fill any voids.
I’ll get pictures for you in a moment.

But essentially: take a fat sharpie and mark anywhere the bottom metal makes interference along the walls of your inlet. Then mill away your markings, then test fit.
Repeat with the sharpie and dremel until everything fits. Then clean up, and get your release agent and epoxy.

Depending on how slow and precise you end up being, estimate 5-10min of test fitting and cutting before you’re ready to bed.

 

[wind gypsy]

I dremeled the stock, not the bottom metal. Then used bedding compound to fill any voids.
I’ll get pictures for you in a moment.

But essentially: take a fat sharpie and mark anywhere the bottom metal makes interference along the walls of your inlet. Then mill away your markings, then test fit.
Repeat with the sharpie and dremel until everything fits. Then clean up, and get your release agent and epoxy.

Depending on how slow and precise you end up being, estimate 5-10min of test fitting and cutting before you’re ready to bed.

Yes, I meant dremel to the stock. Thanks.

 

[43.6N]

Yes, I meant dremel to the stock. Thanks.

First view: action removed looking down into mag well. Note how flush the walls of the inlet are with the bottom metal. You are removing just the thickness of the bottom metal so it runs nearly flush with the walls of the stock.
Majority of the fitting is actually the front and side walls of the box.

Minor fitting at the back edges of the box:



More pictures to follow in next post.

 

[43.6N]

Again, view from top into the Magwell. This time with and without the bottom metal:





Note the small amount of rubbing in the back of the Magwell. This is from the AICS mag fitting very tightly. Because of how tight it is, small amount of sanding *MAY* be required to get the aics mag to fully insert (depends on brand of mag). Just know that the more you remove, the higher the chance of rattle from the magazine.

Mine fit tight, but will not bind while inserting. Metal accurate brand mags do not rattle after inserting because of how tight I have them clearanced in the Magwell.

Make sure you do a little test fitting.

 

[43.6N]

Finally from the bottom:





The “grime” you see is shoe polish release agent that I’ve neglected to clean off.

That lip is a good indicator of the extent of the cutting I did.

You are removing just enough to get the metal to fit flush-ish with the walls of the inlet. Then fill whatever voids you end up making with bedding compound.

 

[Bluumoon]

Finally from the bottom:
View attachment 1047500View attachment 1047502

View attachment 1047501View attachment 1047503


The “grime” you see is shoe polish release agent that I’ve neglected to clean off.

That lip is a good indicator of the extent of the cutting I did.

You are removing just enough to get the metal to fit flush-ish with the walls of the inlet. Then fill whatever voids you end up making with bedding compound.

Looks easy enough.

Most importantly how is the function? Especially running bolt fast?
How is the mag release function? Is it easy to bump unintentionally? Easy to quickly drop mags ?

 

[43.6N]

Looks easy enough.

Most importantly how is the function? Especially running bolt fast?
How is the mag release function? Is it easy to bump unintentionally? Easy to quickly drop mags ?

So I have it on a 223 now that feeds from MDT 12 round poly mags.
The feed lips make positive contact with the bolt when the mag catch clicks into place. When you retract the bolt to the rear, about 50% of the 223 rim is in contact with the bolt face. They present the bullet in such a way that they are aimed straight at the breach before the bolt even makes contact with the case rim. I’ll try and get a picture tomorrow of the feeding geometry.

I’m at 1500+ rounds of 223 through this setup since August of last year. Zero ftf.

I have a second that is set up for 22 creed, and it’s the same boring reliability.

The mag catch lever on mine is protected in the trigger guard. It takes positive pressure to release, but hasn’t bound up or galled.

 

[Bluumoon]

So I have it on a 223 now that feeds from MDT 12 round poly mags.
The feed lips make positive contact with the bolt when the mag catch clicks into place. When you retract the bolt to the rear, about 50% of the 223 rim is in contact with the bolt face. They present the bullet in such a way that they are aimed straight at the breach before the bolt even makes contact with the case rim. I’ll try and get a picture tomorrow of the feeding geometry.

I’m at 1500+ rounds of 223 through this setup since August of last year. Zero ftf.

I have a second that is set up for 22 creed, and it’s the same boring reliability.

The mag catch lever on mine is protected in the Magwell. It takes positive pressure to release, but hasn’t bound up or galled.

Thanks. I’ve been eyeballing these, but have found almost no real world reports on them or really any AICS conversion.

With the protected release is there room for a gloved finger?

 

[43.6N]

Thanks. I’ve been eyeballing these, but have found almost no real world reports on them or really any AICS conversion.

With the protected release is there room for a gloved finger?

Plenty of room. It’s bigger than the Lumley “arctic” trigger guard.

Now someone at an NRL match I was at had an ND while trying to manipulate a similar mag catch while his bolt was closed. You always want bolt to the rear when working one of these protected type mag releases, and he should have known better.

For hunting though, it’s exactly what I would want to prevent dropping the mag unexpectedly.
But if this is going to be a competition gun, consider the extended lever mag release version.

 

[43.6N]

Thanks. I’ve been eyeballing these, but have found almost no real world reports on them or really any AICS conversion.

With the protected release is there room for a gloved finger?

I ordered the rokstok lite with a CTR inlet, and plan on trying the MDT hunter bottom metal with it. I’ve heard good things about how that bottom metal functioned. And supposedly fits the ctr inlet without any additional inletting.

But the red snake has been great for me this last year. Just go in with eyes wide open about needing a little elbow grease and patience to get it fit correctly.

 

[43.6N]

Thanks. I’ve been eyeballing these, but have found almost no real world reports on them or really any AICS conversion.

With the protected release is there room for a gloved finger?

Here’s the follow up pictures of the aics mag interface with the action:

First, the trigger guard with protected lever. Large, lots of clearance. The mag catch is nitrided steel, not aluminum (I know this because red-snake sent me an updated mag catch when they did a design update last year).

Second, how the feed lips make positive contact with the bottom of the action. This is just after the mag catch “clicks” into place. Less then 1/16” free play from mag catch to making full contact with the action.
In this next picture note how the front of the mag follower sits flush, or above-flush with the bottom lip of the feed ramp.


Third, angle of how bullets are presented to the breech. They sit rather high, and appear to have a straight shot at the chamber.

Fourth, view of bolt contact with case rim.

Fifth, is case rim presentation down bolt raceway. You can see that ~50% of the case is ready to make contact with the bolt (center of primer is in line with the radius of the bolt raceway)

End result is very positive feeding, and probably more important, rigidly stability of the feeding angle from the aics magazine.

The other action that I have set up with the red snake bottom metal is on my 22 creed. It’s on loan at the moment so I can’t snap any pictures. But it’s basically the same thing. The larger case head (compared to 223) simply presents more surface area for the bolt to contact, thus probably more margin for error. In my mind, if this feeds reliably with the 223, absolutely no reason it won’t also be g2g with bigger cartridges.

 

[doverpack12]

I pulled my recoil lug because Kampfeld was doing some work on the barrel and it was out.
My intent was to put the new SRS lightweight lug in.

This lug was the UM lug I ordered separate because this was an original stock run where the lugs were potentially protruding high.

Are these cracks superficial or a potential failure? @Unknown Munitions

 

[WeiserBucks]

I pulled my recoil lug because Kampfeld was doing some work on the barrel and it was out.
My intent was to put the new SRS lightweight lug in.

This lug was the UM lug I ordered separate because this was an original stock run where the lugs were potentially protruding high.

Are these cracks superficial or a potential failure? @Unknown Munitions

View attachment 1047946

View attachment 1047947

View attachment 1047948

That looks like structural failure to me. Had a McMillan do something similar and they replaced the stock under warranty.

 

[Alpha Echo]

I pulled my recoil lug because Kampfeld was doing some work on the barrel and it was out.
My intent was to put the new SRS lightweight lug in.

This lug was the UM lug I ordered separate because this was an original stock run where the lugs were potentially protruding high.

Are these cracks superficial or a potential failure? @Unknown Munitions

View attachment 1047946

View attachment 1047947

View attachment 1047948

Out of curiosity, what cartridge did you shoot in this stock?

 

[doverpack12]

Out of curiosity, what cartridge did you shoot in this stock?

300 WSM. I can get a round count but nothing crazy. Possibly 100 or so 150 max.

If I had to bet I would say the lug recess was too tight and too short. Pulling the original and installing the new UM lug was no easy feat.

 

[Dobermann]

300 WSM. I can get a round count but nothing crazy. Possibly 100 or so 150 max.

If I had to bet I would say the lug recess was too tight and too short. Pulling the original and installing the new UM lug was no easy feat.

This, plus the position of the crack ... I'm guessing you're right - and not only that UM will make it good, but that @Unknown Munitions and @Formidilosus will want to check it out.