View Full Version : 7.62x25 sks. thoughts, ideas?

January 29, 2009, 13:07
ammo is high. time to build a toy that shoots something cheap and this ammo is darn cheap.

my idea.

1. lighten the bolt, probably take a big U of material out of the back of the bolt. skeletonize it as you would. what weight should i shoot for?

2. move gas block back three inches and run a larger gas port for a longer stronger pulse to operate bolt. is this enough?, doesnt have to lock back just cycle enough to feed the next round in.

3. shorten gas tube and gas rod three inches.

4. chamber adapter exopyed in. they make one right? or is there a better way without a new high priced barrel.

5. pssh maq well welded to bottom of the reciever

6. add pistol grip folding stock and pssh mags

Ron Walker
January 29, 2009, 13:14
I think the first bubble you'll hit, regardless of engineering problems, is accuracy. The SKS barrel is bored for a .310 or 11 bullet. The 7.62x25 is a true .308, if my memory is correct. Ron

January 29, 2009, 13:17
should be 7.8mm, 0.31 diameter

USMC 0341
January 29, 2009, 20:28
Mill the locking tang off the bolt. Fix the bolt to the carrier in the tilted-down position.

Forget the gas system - run it as a straight blow-back. If you have to do any lightening take it off the carrier, not the bolt.

Get one of those 16" 7.62X25mm PPSH barrels made for a semi-auto conversion - sleeve it into the receiver if required.

January 29, 2009, 21:31
Originally posted by chromestarhustler
should be 7.8mm, 0.31 diameter

maybe so, but the round I just measured is .308...........

January 29, 2009, 23:15
Originally posted by newfalguy101

maybe so, but the round I just measured is .308...........

I got the same reading.
some thing to think over is the 7.62x54 can and has use a .308 bullet.
the main problem I see with this type of build is ther is not enough gas to move the bolt. in a AK the bolt gets shaved down to removed some mass. the best way would be to blow back. muttman