Project RatRod: SKS shorty

[supernova]

I pulled the FSB today to turn one more thread on the muzzle, so the threads reach all the way to the FSB. Pretty happy with it so far

 

[Mermaniel]

Wawawewa. Always wanted a threaded sks barrel and have a nice brake on it. I want it smooth like an air gun. Lol

 

[Frank Castiglione]

Groups were about 2" @ 50 yds with front rest only. Admittedly I haven't shot open sights for a while and the action has a little play in the stock so I hope to improve on that with bedding and a peep sight. The sound of the sear dragging along during the 1/2" long trigger pull was a little distracting too haha. Most of the trigger job is done. The sear angle was terribly negative and the hammer engagement was rough and slightly rounded at the front. Everything is flat and smooth now. Tomorrow I will cut the hammer and sear spring and shorten the sear a little. Might do some bedding too.

Even the President of the United States of America agrees with me...

 

[Eric_911]

You a lefty or a righty?

 

[supernova]

Righty

 

[Grizzly Adams]

Someday, somebody's going to refer to you as Bubba.

Grizz

 

[aaron v]

Wow, way to derail the thread. To the OP, I like it, it's clean and functional. Thank you for sharing

 

[Jamie]

Brendan10 shuter down! infraction given no where in this thread did the OP say he made his gun Full auto he did a trigger job that is all

 

[Eric_911]

Righty

If your support hand is your left, would you not want to have the compensation pushing downwards and to the right?

It just seems to me it is angled off to the wrong side....

 

[Eric_911]

Okay, okay I get it, no jokes allowed on this forum.

From now on I'll just read and not speak because I'm gonna get shut
down very soon If I dare to speak my mind.

Some guy on this forum has a good quote, "too many rules equals no democracy"
or something like that.

We don't speak of illegal activities on these forums. If you have a problem with that, let it be known, and I'm sure a mod will politely show you the door.

 

[supernova]

The tendency is for the rifle to jump upward and to the side of your strong shoulder during recoil. Shooting right handed, the rifle jumps up and somewhat to the right. Having the comp angled to the right pushes the muzzle back to the left and down so the muzzle travels less off target. At the range yesterday it was quite enjoyable to shoot, jumping far less than it would with a bare muzzle. Its still no battlecomp or FSC but a big improvement for such a tiny, simple little device.

If your support hand is your left, would you not want to have the compensation pushing downwards and to the right?

It just seems to me it is angled off to the wrong side....

 

[CharlesT]

I may be wrong (I often am) but I was under the impression that the reason for the offset on the AK slant brake was to compensate for the rotation of the bolt as it cycles. As the SKS has a non-rotating bolt, shouldn't the brake be aligned at 90[SUP]o[/SUP] to the barrel?

Very nice work BTW.

ct

The tendency is for the rifle to jump upward and to the side of your strong shoulder during recoil. Shooting right handed, the rifle jumps up and somewhat to the right. Having the comp angled to the right pushes the muzzle back to the left and down so the muzzle travels less off target. At the range yesterday it was quite enjoyable to shoot, jumping far less than it would with a bare muzzle. Its still no battlecomp or FSC but a big improvement for such a tiny, simple little device.

 

[supernova]

Its definitely not for the rotation of the bolt, installing it straight up is wrong and will result in violent overcompensation. I explained it in my previous post.

I may be wrong (I often am) but I was under the impression that the reason for the offset on the AK slant brake was to compensate for the rotation of the bolt as it cycles. As the SKS has a non-rotating bolt, shouldn't the brake be aligned at 90[SUP]o[/SUP] to the barrel?

Very nice work BTW.

ct

 

[CharlesT]

Just trying to wrap my head around this.

If what you state is correct, and it may very well be, then why do conventional (ie not slanted) brakes have ports cut at 0, 90 and 180[SUP]o[/SUP] to each other? After all, an SKS is just a semi auto bolt rifle.

As far as I can remember, the slant brake for the AK was developed as the rotating bolt caused the rifle to twist when fired in full auto.

Interesting this ...

ct

Its definitely not for the rotation of the bolt, installing it straight up is wrong and will result in violent overcompensation. I explained it in my previous post.

 

[Eric_911]

Just trying to wrap my head around this.

If what you state is correct, and it may very well be, then why do conventional (ie not slanted) brakes have ports cut at 0, 90 and 180[SUP]o[/SUP] to each other? After all, an SKS is just a semi auto bolt rifle.

As far as I can remember, the slant brake for the AK was developed as the rotating bolt caused the rifle to twist when fired in full auto.

Interesting this ...

ct

The slant brake is all about compensating muzzle rise when emptying your AK magazine with one trigger pull. Without the brake, during automatic fire, the rifle would have a tendency to climb up and left or up and right. (Depending if you're a righty or lefty) Nothing to do with the rotating bolt.

 

[supernova]

Its simply a function of design. The Slant comp directs gas in one direction only, and thus produces a force in the opposite direction. Remember, it is as simple as muzzle devices get. Newer designs direct gases in multiple directions to accomplish different goals. Two opposing ports 180 deg. from each other will cancel each other out as far as applying any force but recoil is reduced as that gas is not creating the thrusting force that makes up a lot of recoil. Angled ports, like on top of the Czech VZ-58 brake are for compensation to keep the muzzle down and help prevent side movement while the side ports reduce recoil. The slant comp simply applies one force in one direction to directly counter what happens during recoil. It pushes in the opposite direction the muzzle is trying to go to help keep you on target.

Just trying to wrap my head around this.

If what you state is correct, and it may very well be, then why do conventional (ie not slanted) brakes have ports cut at 0, 90 and 180[SUP]o[/SUP] to each other? After all, an SKS is just a semi auto bolt rifle.

As far as I can remember, the slant brake for the AK was developed as the rotating bolt caused the rifle to twist when fired in full auto.

Interesting this ...

ct

 

[supernova]

BTW a big thank you to the mod who cleaned this thread up, much appreciated

 

[Travis Bickle]

One of the few "modifications" I've ever seen that actually improved the rifle in any way vice just making it look ridiculous.

Well done Sir.

I like the "Excess Trigger Pull/Quick Reset Mechanism C1A1" as well hahaha Simple and efficient, the Soviet Approach so to speak

 

[supernova]

Thanks Trav, you hit the nail on the head with the Soviet approach. I wont do anything to the rifle that might reduce its reliability like the gas tube mod, or increase its weight/size unneccesarily. As its sits the rifle is 39 9/16" from buttplate to tip of the slant comp. I bought 4 Tapco mags but was unhappy with them so Im sticking with the original. Luckily a buddy of mine bought them off me for exactly what I paid, which is still a great deal. He wound up getting 5 Tapco mags for $200 and I didn't lose a dime! I'm also doing the mods on his rifle as well, he's been very inspired by mine especially after shooting it.

One of the few "modifications" I've ever seen that actually improved the rifle in any way vice just making it look ridiculous.

Well done Sir.

I like the "Excess Trigger Pull/Quick Reset Mechanism C1A1" as well hahaha Simple and efficient, the Soviet Approach so to speak

 

[Rick911]

Seems like a lot of work for 2 inches. I wouldnt do it.

Very nice results indeed.