TKO Airguns

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Please be sure to read our Shipping Policies before ordering!
If paying by check or Money Order, See Ordering Instructions at the bottom of this page.

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Section 1
Section 2
Marader Pistol
Section 3
Fill Caps
Section 4
1" Moderaors
Section 5
.875 Moderators
Section 6
.875 Moderators
Section 7
Custom Items
Section 8
Crosman - 1911

The Discovery and Maximus air rifles by Benjamin (owned by Crosman Corp.) have been a very successful product line. These entry level PCP air rifles are capable of very good accuracy and power. That power comes at the expense of a quite loud rifle. The TKO Moderators have been specifically designed for the valving and power output. The TKO Discovery and Maximus Moderators have been extensively tested since the introduction of these rifles in 2008, and are at the pinnacle of performance for such a small diameter airgun moderator.

Discovery Air Rifle
Maximus Standard Air Rifle

View a great YouTube video review of the Benjamin Discovery Air Rifle by Ted's Holdover.

The Crosman 2240 and most of its siblings (2250, 2240XL, 2300, 2400 and more...) and the 13XX pistols are some of the most popular air pistols in the world. As stock from the factory they perform well, and there are a ton of modifications available for them from many hobbiest suppliers.
This TKO WILL NOT fit the 2240 XL version ..
See Section 5...>

NOTE: This is an old archived page from the Website: Click here to be directed to the new page.

Section 1:

5" & 6.5" TKO Airgun Moderators for the
Benjamin Discovery and Maximus Standard Rifles, and Crosman 2240 style pistols, C362, and other carbines and rifles.
(See below for Gun Models.)

The BEST Moderator for the Benjamin Maximus, Discovery, and other Crosman rifles and pistols that use the standard .435 (7/16" barrel). Custom lengths are available for special projects. Call or email us your needs.

Will Fit and work great on these models:

  • Benjamin Discovery and Benjamin Maximus Standard Rifles
  • Crosman 1300KT, 2240, 2300, 2300T/S, 2400KT, 2250, 2260, 1740, 1760, 760 pistols and rifles.
  • Will also fit the 1377/1322 and 2289 with a barrel of at least 11.25".
  • Fits the Crosman MK-177 with modifications to the factory flash hider.
  • Also fits the Umarex Gauntlet .177 and .22 with the factory shroud removed, however, we recommend a larger .875" TKO Mod for that rifle.
  • Will not fit the 2240 "XL" version .. See Section 5...>

NOTE: This Mod will fit the Benjamin Maximus "Standard" rifle. If your Maximus is the "Euro" or "Hunter" model, please see Ordering Section 5.

If you are ordering this mod for the Discovery rifle, you can send us your original fill cap for free machining and return shipping. Send to the address at the bottom of this page...


We now have custom Machined Fill Caps available for the Discovery rifle!
See the Correct Product Page for more info. (The Maximus rifles do not require the fill cap to be altered.)

Limited Time Offer:
Free 1911W or Discovery/C362 Trigger
Free TKO 1911 or C362 Trigger with purchase of a TKO LDC from this section. Simply enter "FREE 1911 Trigger" or "Free C362 Trigger" in the "Note to TKO" area before clicking the Add to Cart button.
(See more information about the TKO 1911W and C362 Trigger Here...>.

If ordering by mail, make checks or money orders
payable to and mail to:
Mike Tiehen (TKO)
323 S. 50th St
Omaha, NE 68132

Include a note with your email address with your order and we will provide a USPS Tracking number upon shipment.
Please be sure to read our
Shipping Policies before ordering.


TKO Airguns - 323 South 50th St. - Omaha, NE 68132 USA
402-889-9222 -
Phone Hours: 1 pm - 5 pm Mon --- 8 am - 5 pm Tue-Fri --- 8 am-12 noon Most Saturdays --- Closed Sundays

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