Poly Choke 20 ga Adjustomatic External Choke 1960s
robertsontradingpost A+(6508)
Used Condition
FFL is not required
Unit Price
Quantity Available
Immediate checkout
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Time Left
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11/17/2017 12:25 PM
Item 684280976
Location Henderson, TN 38340
Priority Mail$10.00
See Item Description
No international shipments
Payment Personal Check, Visa / MasterCard, Discover, USPS Money Order, Money Order, Certified Check, See Item Description
Checkout Yes, Immediate
Sales Tax
Seller must collect sales tax from the following states:
TN 9.75%   
Inspection/ Return Policy
Seven Days from the date the item is received

The seller of this item assumes all responsibility for this listing. You must contact the seller to resolve any questions or concerns before placing a bid. Payment must be made using U.S. dollars ($) unless otherwise stated in the listing. Firearms may only be shipped to a licensed dealer (FFL Holder). Some listed items may not be legal in every state. Complete your purchase within the law.

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Poly Choke 20 Gauge Adjustomatic External Shotgun Choke 1960s Production New Old Stock Hartford Gun Choke Co. Polychoke Ancestor 1969 Vietnam Bags
OUR # SA06111
Grips, Magazines, Slings, Holsters, Scopes, Mounts, Parts , buy any 3 items and get Free Shipping! Guns and ammo excluded. Lower 48 only. Shoppers - who - use - the - GunBroker - checkout - will - have - their - shipping - refunded - on - orders - that - qualify.

Item Description

Here is an interesting accessory for plain beadsight barreled 20 gauge shotguns, but it’s also collectable in its own right, even if a person doesn’t own a 20 gauge. This is an external variable choke tube that attaches onto a plain – not vent rib – 20 gauge barrel via a silver solder or similar gunsmithing process. Its installation will require a competent gunsmith or similarly skilled artisan, and we are not competent, or skilled, or gunsmiths. Manufacturer on this tube Assembly was Hartford Gun Choke Co., Inc. Construction entirely steel, blued finish externals, but with a conventional brass bead sight. The purpose of this Adjustomatic is to give the hunter flexibility, as with upland game and birds, for an open pattern on the first shot, and tighter patterns on subsequent shots as the shootee candidates distance themselves from the hunter. The choke tightens itself from friction and recoil, depending on how the operator sets it to begin with. This device was designed for use with small pellet lead shot, numbers 4 to 9 shot, in a 20 gauge plain beadsight barrel shotgun. It will not work on a 12 gauge shotgun. It will not work on a 16, 28, or .410 gauge shotgun. It will not work on a 20 gauge shotgun that has a rifled sight, or that has a ventilated rib. It will not work on a double barrel side by side or over and under shotgun. It will only work on Single Shots, Pump Actions, Bolt Actions, or Semi-Automatics chambered in 20 gauge, for use only with lead shot, and that have a plain bead sight barrel. It will not work on a barrel whose outside diameter exceeds .750 inches. It will need installation by a competent party. This choke device was manufactured sometime in the late 1950s or early 1960s, before the company reformed itself as Poly Choke, a still thriving establishment. The period of production flyer that is included has a Zip Code, which indicates earliest production of 1963, and the packaging, interestingly, has Vietnamese transliteration dated from April of 1969. This tube and its mates, then, were probably manufactured in 1964, and shipped to Vietnam so that the capitalist elites could pheasant and duck hunt. Most likely, they were in Communist Hands until the thawing of the 1990s. Condition is Mint or Near Mint, these have been stored in Chinese Army Cosmoline until they were recently cleaned. We found them in an old East Coast Warehouse, only a few of them. The 1969 price was $29.95 installed. We can’t quite match that, even if we wanted to. We’re offering these Adjustomatic 20 gauge choke tubes, the one in the photos or its identical mate, each for only $ 39.00.


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  • No American Express
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  • 90 day layaway available with a 20% deposit.


USPS Priority Mail, insured with Delivery Confirmation.

  • Buy any 3 Non Gun Non Ammo items and shipping is free to the lower 48. Shoppers who use the GunBroker checkout will have their shipping refunded on orders that qualify.
  • $10 lower 48 for 1 or 2 items.
  • $20 to AK, HI and PR no matter how much you buy.
  • Tracking information provided by email as soon as it's available.


7 day money back on used items. No return on New Items, layaway, or ammo. New items are covered by the manufacturer. We do not pay transfer fees or return shipping.

No sales outside the US.

  • Phone hours 8:00 – 5:00 CST Mon - Fri CST. Local pickup OK. Robertson Trading Post 117 Front Street PO Box 365 Henderson, Tennessee 38340 We Buy, Sell, or Trade. We always have, since 1952.
  • Phone # 731-989-7641
  • Buy 3 Ships FREE: Combine any three or more of our accessories and shipping is FREE for the entire order

    Guns and Ammo excluded. Lower 48 Only.

    Shoppers who use the GunBroker checkout will have their shipping refunded on orders that qualify.

    Mfg Part Number