Mossberg 500 Barrel 12 ga 3” 20” Invector MOS1
robertsontradingpost A+(6512)
Factory New Condition
FFL is not required
Unit Price
Quantity Available
Immediate checkout
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Time Left
5d +
10/24/2017 12:25 PM
Item 673703510
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
AS IS - No refund or exchange

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.

Please read the Additional Terms of Sale for important listing details.

Mossberg 500 12 gauge 3 inch 20 inch .735 Cylinder Bore Invector Accu Choke Tactical Riot Barrel 1 Tube Bead Sight Target Sports Norinco
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

This listing is for ONE Barrel. Buy any 3 of our non gun non ammo items and shipping is Free for the entire order, lower 48. Barrels always ride free with gun orders. Here is an excellent, all steel riot or tactical barrel to fit any 12 gauge Mossberg 500 shotgun chambered in 12 gauge, and with a standard magazine tube. Manufacturer is China North Industries group in the world’s most populous nation. Importer and warrantor is Target Sports of Texas. Construction is entirely steel, with matte blue military finish. Sight is conventional threaded brass bead. Overall length is 20 inches, from muzzle to chamber mouth. Choke system is Accu-Mag thread, the same choke tube system that ships with current production Mossberg 500 and 535 pump shotguns; the same as the old model Browning Invectors. Muzzle choke is 5 slash .735 Cylinder bore. Outside diameter is .998 at the muzzle, and 1.250 at the chamber mouth. This barrel will handle 2 3/4 inch or 3 inch shells. It will NOT chamber a 3 1/2 inch shell. This barrel will also turn a model 500 field gun into a compact and formidable home protection device. This barrel will fit any Mossberg model 500 or Maverick model 88 shotgun chambered in 12 gauge whose magazine tube will hold 5 each 2 3/4 inch shells, and whose magazine tube measures 13 1/2 inches from the receiver face to the end of its magazine tube. That includes over 95 percent of Mossberg 500s in existence today. It also fits Western Auto Revelation 310 series 12 gauge pump shotguns; it also fits Wards Western Field models 505, 509, 524, 534, 536, 539, 550 all variants, because those were made by Mossberg for Western Auto and for Montgomery Wards beginning in the 1960s. It will not fit an 8 shot model 500 whose magazine tube is 19 inches long. It will not fit a 20 gauge Mossberg; will not fit a .410 gauge Mossberg; will not fit the dump lever of a 1947 John Deere Manure Spreader. It will only fit Mossberg 500 series pump or slide action shotguns whose magazine tubes hold five 2 3/4 inch 12 gauge shells. It will not render 1960s and 1970s production shotguns that were chambered only for 2 3/4 inch shells magnum capable. Every barrel comes in its factory box with protective wrapper, silica gel, and grease coating. Replacement pricing in our area on a common 18 inch Mossberg barrel is upwards of $150, and Mossberg does not make a factory 20 inch barrel with choke tubes like this one. We’re offering the Norinco / Target Sports barrel in the photos, however, or one of its identical mates, each for only $ 79.00. Any ammunition, firearms, or personnel in any photos are Not included. Add a Skeet or Extra Full choke tube for $14.00 each and no extra shipping. Invector choke tubes also fit Mossberg Accu chokes. Add a Carlson’s universal choke tube wrench for $5.00 and no extra shipping.


Visa, MasterCard and Discover. USPS MO paid orders shipped ASAP. 7 day hold on checks.

  • No American Express
  • No PayPal
  • 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