Wiselite bolt smooth as butter, BRP bolt stuck

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cbass
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Wiselite bolt smooth as butter, BRP bolt stuck

Post by cbass » Fri May 29, 2020 12:42 am

Been years since I've posted (aside from some spare mg42/53 parts i listed for sale). First off I hate posting without providing pictures/videos which would make explaining things easier.

I have a semi auto mg42/53. The firearm was made buy a company in Utah (forgot the name) unknown date, but purchased from a member from the forum.

The wise lite bolt runs smooth zero issues from what i recall (its been 3 months since I've fired it & i haven't been around the gun since last firing it). I purchased a BRP bolt and grip stick since I've read those seem to work better. However the BRP bolt is tight fight to the point a rubber mallet and some TLC has to be used to insert / remove it.

I suspect the rear issue is in the rear of the receiver as once the bolt makes it past this area there is no hang ups. Im not sure if its the rails or buffer tabs as the wise lite bolt has no issues.

Any help would be appreciated!

-cbass

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Re: Wiselite bolt smooth as butter, BRP bolt stuck

Post by JBaum » Fri May 29, 2020 8:54 am

What is it you need help with? Measure the two bolts and see what dimensions don't match, or measure the rails and see where they're tight. Fit the bolt to the gun or fit the gun to the bolt.
John@German<remove this>Manuals.com

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Re: Wiselite bolt smooth as butter, BRP bolt stuck

Post by Der Alder » Fri May 29, 2020 7:04 pm

I have an early Wiselite and they used both original bolts and bolt carriers on outside dimensions (other than the rear part for the recoil spring, though their internals were modified. Hence From what I'm gather your issue is not so much a WLA bolt issue as it is a factory Yugo variance....unless we are talking the semi rear section.

I have run into after building several M53 kits variances in bolt carrier and bolt head widths. I've had some that slide like butter in the same gun while others are very tight as you mentioned in the same gun...probably why even with German guns spare bolts were numbered to the gun.

But again the WLA bolt should on outside dimensions be the same as the original along with mentioned variances (except for perhaps the added semi rear section which may vary as well).

Both WLA and BRP used as is WLA's case a "tail section" as I'll call it for the recoil spring/hammer, while the BRP used is its first generation a similar rear section grafted to an original M53 type... and BRP's 2nd generation used an entirely new bolt carrier.

But again you will find tight/loose variances with many of the Yugo M53 bolts and bolt carriers that were never modified.

Here is a pick of a few of mine from a few years back...left to right, first 2 are WLA's and 3rd is BRP 1st gen and last on right is BRP 2nd gen. BRP 2nd gen is drastically different from the original and also much heavier BTW.

<a href="https://ibb.co/zPSzspt"><img src="https://i.ibb.co/9yq7n6d/c104-1832-cr.jpg" alt="c104-1832-cr" border="0"></a>




All that said, from what I learned kit building is their is no guarantee that all bolts and B/C's will be exactly the same in width and sometimes they need either swapped with different parts or the rails taken out and hit on the belt sander (outsides) to make them wider dependent on parts. This is why we recommend using screws when building to hold the rails until parts fit is determined, then riveting.

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Re: Wiselite bolt smooth as butter, BRP bolt stuck

Post by cbass » Fri May 29, 2020 7:43 pm

Thanks for the feedback. Unfortunately the earliest I'll be able to get back to my gun is on the 26th, and the following day I'll be driving across country (moving). So the earliest I'll be able to tinker with things would be the weekend of July 4th.

So the WL bolt is the same as Der Adler posted. My BRP bolt is their Gen 2. I just switch out the bolt head between bolts as i have the gun for 8mm & 7.62x39. But again the BRP bolt is always a b*tch to get in and remove so i have used it on one occasion.

This is the major issue im having with the firearm. I also have minor issues (top cover popping open when firing, both bolts will get stuck when charging (i have to pull the bolt back then close the top cover), and slam firing/prolonged bursts).

If i can get the bolt issue fixed, the rest is minor stuff.

-Cbass

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Re: Wiselite bolt smooth as butter, BRP bolt stuck

Post by Jaredrlewman » Sat May 30, 2020 6:29 am

If your gun is setup for WL parts, BRP parts are not drop in exchanges. We charge upwards of $1000 to convert WL guns to BRP internals, because typically there are a laundry list of things that need corrected to do so. I won’t mix and match WL and BRP on the same gun and all the ones I build are BRP internals.

When I build these guns we fit the rails to the components. Don’t modify your receiver or bolt. Same with converting a WL gun, fit your rails. These are stamped sheet metal guns, or “Milled” for WL, and bend and warp. Fitting is required.

If you want to tackle this check the following:
- Do your bolt heads drop freely from the rear into the barrel?(no gripstick on the gun)
- do your carriers drop free from the rear to the front?
- do your bolt and carrier assemblies drop free?
- Now add your gripstick and repeat
- fit rails to components as needed for clearance
- sometimes your receiver can be slightly pinched in an area. A set of screwdrivers crossed in opposing rails you can pry and tweak, I find this more so In welded receivers due to heat warpage from cutting and welding.

There are modifications we do to the bottom of all receivers to adjust the angle of the gripstick in relation to the bolt allowing true clearance of the hammer and the bolt.


Now on to your top cover.
- Rebuild and or clean your recouperator, if you have not done one send it out
- once you know your recoup is clean and in good working condition assemble the entire gun. Remove your booster and turn the gun on it’s end. Pushing against the barrel bearing pogo the gun pushing it down and letting it jump back up. If it doesn’t figure out why.
- if the pogo test is successful move on to checking your top cover latch and fitment.

Why not jump straight to fitting the top cover? Usually a sticky recouperator will pop and snap the barrel and stick and the bolt fires and has to slam extra hard to get the recoup moving. This I have never found to be dangerous but the extra slam and jerk along with a gripstick not clearanced the way I do causes top cover to pop even if you fit the crap out of it. Plus it is always a good idea to have a good recoup. Also the slam firing and sticking you describe sounds like a sticking barrel or recoup, trust me it causes all kinds of quirky stuff to happen...

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Re: Wiselite bolt smooth as butter, BRP bolt stuck

Post by Abominog » Sat May 30, 2020 5:36 pm

I’ve gun/ bolt combinations that won’t fit. BRP or otherwise. One bolt works great in any gun, except one it won’t fit in. Ditto with a BRP bolt- but it’s a different gun.

This is 10x worse with Mg34. I have one factory bolt that won’t go into anything. Each gun/ bolt combo is dedicated.

Often the problem is rails like Jared shared. Sometimes it’s stacking tolerances

THANKS to Jared for sharing his hard learned insights. I know he is busy as heck, so his time is expensive to him, and he’s sharing the info on which he depends to make a living.
FNG

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Re: Wiselite bolt smooth as butter, BRP bolt stuck

Post by Der Alder » Sun Jun 07, 2020 4:23 pm

Yeah cause no one who reads these threads all the way through sees no one brought up rails....lol

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Re: Wiselite bolt smooth as butter, BRP bolt stuck

Post by Der Alder » Sun Jun 07, 2020 4:27 pm

BTW, new MG3 rails like those sold through RTG are thicker than stock/kit M53 Yugo rails....which is why again I had said sometimes they need hit on a belt sander to make fit with some bolt and B/C's...lol.

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