finally finished my .300 Whisper

[tdale4]

I finally finished my .300 Whisper

tp555 9" 1:8 twist barrel
tp555 3 position gas block
Magpul stock and hand grip
DPMS Lower with RRA 2 stage trigger
RRA Upper with RRA bolt carrier group
YHM Handguard
ATF Approved Form 1 home built silencer permanently attached to the barrel
EoTech XPS3-0
PVS14 (for hunting hogs at night)


http://i704.photobucket.com/albums/ww41/tdale/300Whisper.jpg

Now I gotta work up some loads

Should be Hell on hogs:grin:

[Spook]

nice lookin' rifle :smile:

[hugginsvilleH&A]

nice work , what kind of mount are you using for the pvs14?

[Colohunter]

Nice looking rifle.

[tdale4]

nice work , what kind of mount are you using for the pvs14?

A mount like this


http://i704.photobucket.com/albums/ww41/tdale/pvs14mount.jpg


http://www.bhphotovideo.com/c/product/507370-REG/US_NightVision_000447_Small_Arms_Weapons_Mount.htm l

[Fritzcat]

A nice looking rifle, I would like some info on suppresor.

[tdale4]

A nice looking rifle, I would like some info on suppresor.

it's an M baffle design. Not my design, but one I copied from the Silencer Talk forum. All the credit for this design goes to Sub-Sonic on the silencertalk forums, it was his design and from videos he has posted it works extremely well

the entire cost of the silencer was about $250 ($200 for the Tax stamp and about $50 for materials)

$10 for the Stainless Tube http://www.onlinemetals.com/merchant.cfm?pid=481&step=4&showunits=inches&id=19&top_cat=0
$16 for the freeze plugs http://www.clipsandfasteners.com/1_1_2_Cup_Expansion_Plugs_p/a3965.htm
the other $24 was spent on shipping for the above items and on a few miscellaneous parts like the pipe fitting that was welded to the can and blind pinned to the barrel

I didn't have access to a CNC Lathe or CNC Mill so I had to use a simple to make design.

Here is a link to the design I copied. You will need to join the forum to view the entire post http://www.silencertalk.com/forum/viewtopic.php?t=19231

I used 1.625"x12" 304L stainless for the tube. The ID is 1.495". and I made the baffles out of 1.5" freeze plugs that were subsequently bent into M baffles.

Below are a few pictures (again not mine, but from the original post of the silencersmith form) showing the baffles and how to make them

Place a 3/8" ball bearing in the enter of the freeze plug and place the freeze plug on an appropriately sized socket

http://i704.photobucket.com/albums/ww41/tdale/Baffle1.jpg

Tape it to the freeze Plug and place it into a vice

http://i704.photobucket.com/albums/ww41/tdale/Baffle2.jpg

Clamp down on the vice

http://i704.photobucket.com/albums/ww41/tdale/Baffle3.jpg

Dill your bore hole and grind out some of the freeze plug skirt to reduce weight

http://i704.photobucket.com/albums/ww41/tdale/baffle.jpg

I overview of the design....except that mine is permanently attached with welded in place blind pins

http://i704.photobucket.com/albums/ww41/tdale/Suppressor.jpg

[Fritzcat]

Did you do the machinening yourself? I have some ideas, but have to wait to send a Form 1 because I am now out of a job. I did buy a 16x40 Lathe and a small Mill & Drill that I had in the Machine Shop before the Company got stripped out. I still have plans, just have to want on the money and it will be convenient haveing the tooling at home.

[tdale4]

I feel your pain, I lost my job 2 months ago

Anyway i did all the work myself.

I have a small 7x14 lathe that made centering the holes in the baffles easy

but there isn't much machining needed with the design I built

just drill holes in the baffles after you bend them then heat treat them and pound them into your tube with a big hammer

the hardest part was engraving the tube to ATF specs. once I got my home-built electroetcher working it wasn't hard

[kanton]

tdale4,

How and why did you heat treat the zinc freeze plugs?

Thanks.

[tdale4]

tdale4,

How and why did you heat treat the zinc freeze plugs?

Thanks.

The freeze plugs are made from a zinc plated soft steel

I heated them up to red hot with a propane torch and quenched them in salt water. I did this twice. then I heated them up to red hot and quenched them in used motor oil

I did this because it is suppose to harden the steel and provide a longer life by reducing the erosion that occurs in a silencer

[shooter McGavin]

doing some research myself. You used stainless tube. It weighs roughly 1lb/linear foot. I also see they sell aluminum tube. The weight is 1/3 for roughly same wall thickness and diameter. 2/3 for double the wall thickness.

http://www.onlinemetals.com/merchant.cfm?pid=4363&step=4&showunits=inches&id=71&top_cat=60

did you do any research on whether the aluminum tube in these thickness was up to the task. There is a substantial weight savings for the thin was. still some for the thicker stuff. Just curious.

Mike

[L1A1Rocker]

I finally finished my .300 Whisper

tp555 9" 1:8 twist barrel
tp555 3 position gas block
Magpul stock and hand grip
DPMS Lower with RRA 2 stage trigger
RRA Upper with RRA bolt carrier group
YHM Handguard
ATF Approved Form 1 home built silencer permanently attached to the barrel
EoTech XPS3-0
PVS14 (for hunting hogs at night)


http://i704.photobucket.com/albums/ww41/tdale/300Whisper.jpg

Now I gotta work up some loads

Should be Hell on hogs:grin:

Love the way that rifle looks!!! I'm planning on doing something similar when my docs (Form 1 sent Feb. 19) and parts finally get hear.

[jonblack]

Can you show us a pic of the hand guard where you access the gas block? I have been interested in the YHM had guard and wondered how well it worked out with the tp555 adjustable block.

Thank you
jonblack