This is what a genuine SPAS Choke looks
like. It screws on the end of the barrel after removing the thread
protector. It extends from the end of the barrel and actually lengthens
the barrel. This is the opposite of most choke tube systems that
install inside the end of the existing barrel.
They have the same advantage as "sporting
clay" tubes in that the can be quickly changed in the field without tools.
They have a big disadvantage -- you can't buy them anymore.
This is the Choke Adapter I am making.
It looks a lot like the Franchi part. But while the Franchi part
was made as a certain choke -- full, 3/4, etc. -- my adapter will hold
any Winchoke tube made. The adapter must be used with a choke tube
installed to protect the internal threads, just like any other shotgun.
It will take most tubes made for ITHACA, BROWNING, WINCHESTER, WEATHERBY, S & W, SAVAGE, RUGER, MAVERICK, and MOSSBERG shotguns, or any 13/16x32 thread tube.
The finish is a semi-flat black oven baked-on enamel. It consists of a genuine Franchi SPAS12 end cap that has been modified on a lathe and a modified Winchester choke adapter brazed on the end.
I have tried to keep the price as low as possible. This many manufacturing operations on a batch of 10 parts could have easily made them $400 each, but we pulled a few tricks.
What the adapter will work with -- and really was designed for -- is a rifled tube for discarding sabot rounds.
It is essential that a Sabot round be spinning when it leaves the barrel. The centrifugal force will cause the plastic sabot pieces to fly off the round. If they stay on the round they can cause much drag -- and if one falls off first, the round will not go straight.
Several makes of rifled tubes will do this
job nicely. I recommend one, a huge 5" model from Hastings
(below).
SDI 12
It will take all the normal range of choke tubes:
It will take tubes that
are flush with the end.
It will take tubes that
extend from the end of the adapter.
It will take most of the
exotic tubes like this ported recoil reducer.
The ID of the Franchi barrel is not what a US (or Winchester) barrel would be. The Europeans tend to make their barrel ID smaller than the US standards -- their Cylinder Bore barrel will gauge somewhere between "3/4 Choke" and "Improved Cylinder."
What does this mean? It means that as soon as the shot or shot cup or slug or sabot leaves the end of the SPAS barrel, the ID will jump up a tad at the start of the Winchester choke tube. If a full cylinder tube was put in, the OD would remain at this larger number to the end of the gun. If a Winchester tube such as full choke is installed, the ID would step up at the start of the tube, but then squeeze down on the load.
So the effects of simple choke tubes will be less than what you had wanted, you will need to experiment.
There is a chance that some "extreme" chokes such as Turkey Shoot tubes might be too much for it, you might need our fully welded model.. And if you put a full choke tube in and shoot deer slugs, you'll likely tear it up (as you would tear up any gun doing anything that dumb).
The cost is $239 plus S&H
These are normally available -- please write and I'll send you an invoice. I normally have parts for one or two.
Shipping and handling is a flat rate of $8.00 per order to anywhere in the USA, sent via USPS Priority Mail (2-3 Days). (International, see below)
Fine Print: All purchases
are final, and are F.O.B. Kettering, Ohio. We may exchange an incorrectly
ordered part at our option, but no refunds are given -- we can't sell used
parts. THIS PART IS SOLD "AS IS" BY APPLIED TECH, INC. AND
WITHOUT WARRANTIES AS TO PERFORMANCE OR MERCHANTABILITY OR ANY OTHER WARRANTIES
WHETHER EXPRESSED OR IMPLIED. NO WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE IS OFFERED. THE PURCHASER MUST ASSUME THE
ENTIRE RISK OF USING THE PART. ANY LIABILITY OF THE MAKER, OR SELLER,
WILL BE LIMITED EXCLUSIVELY TO REFUND OF PURCHASE PRICE. Professional
installation is recommended.
We try to deliver most orders
from stock, but delivery may take up to 45 days.
If you are ordering from
outside the USA, the shipping, handling, and Customs paperwork is a flat
rate of $31.00 per order
for USPS Global Priority Mail (4-7 days) wherever it can be sent.
Our Post Office has just
raised the rate for International Priority Mail to $21 for most
destinations. I also have to do customs paperwork, and I must
stand in line at the Post Office for 20 minutes and personally mail
international shipments.
C.
PO BOX 292039
Kettering, OH 45429-0039
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I'm going to try to put up some links for rifled tubes that fit this adapter.
Note that some work with sabots and slugs, and some only work with sabots.
Lastly, some "rilfed" tubes have straight rifling. While this helps with shot at a Turkey Shoot, it won't help a sabot. I don't show those.
(Pronounced "sa-bow")
This Hastings tube is the best you can buy for sabot use. The rifled steel choke tube effectively and consistently separates the sabot from the bullet at the same point every time for improved performance. Without any spin, the plastic parts will stick to the bullet and fall off randomly, steering the round every-which-way.
(Ugly Prototype welded Adapter
shown here)
Also works great with all lead slugs. (Not recommended for use with Remington Copper Solid ammo.) Made to the same internal specifications as Hastings premium, rifled barrels. It is called Paradox rifling because it is both rifled and smooth bore at the same time. Rather than square grooves for rifling, it has raised smooth humps like an HK P7M8 barrel. The long length is needed because this type of rifling is "gentle."
SPECS: Steel, black oxide, matte finish. 5" (12.7cm) long, .900" (22.8mm) O.D. Looks awesome on the end of your SPAS. They retail for around $57.95.
I can no longer buy these from my wholesale distributor, so it is best you buy them yourself.
Our friends at Carlson's
not only have the only SPAS parts inventory -- they are really a choke
tube maker, and make a very nice unit.
These precision Rifled Choke Tubes are manufactured from 304 high stress stainless steel. Each choke tube protrudes .625 to 1.3 inches from the end of the barrel depending upon which type of firearm the choke tube has been specifically designed for. Each choke tube has a right hand rifle twist, which is 1 to 35. Each choke tube has a groove diameter of .730 of an inch in 12 ga. These choke tubes have a matte black finish and carry a lifetime warranty. If you're looking for improved accuracy from a smooth bore barrel these fine choke tubes will improve your groups.
To fit Winchester, Browning Invector, Mossberg 500
PRICE: $34.95
This is the Cation "Sniper" Rifled choke tube.
The
rifling is cut with an electrochemical process and comes out perfect every
time. You can shoot sabots or any commercially available slugs.
It sticks out the end of the gun about an inch. You want
the S-811.
Lists $43.95.
Colonial
Arms makes this one:
Twelve broach-cut lands and grooves stabilize
all types of slugs for a tremendous increase in accuracy over smooth bore
barrels.
SPECS: E.D.T. 150 steel, blued.
$49.50 Model 12-IVRIF
They
also make this nice ported extension.
Lastly, Winchester makes a nice one for
sabots
only, a very capable tube:
WINCHOKE SABOT RIFLED
Item Number: 6130173
U.S. Suggested Retail: $60
