Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Special offer available for this product. Click here to see!
Questions & Answers
Is this 18x1 thread pitch? Expert Answer

The Code's listed on this page are as follows:

SKUS
SIG MOSQUITO 1/2 X 28 (AC4)
WALTHER P22 1/2 X 28 (AC5)
GSG 1911-22LR 1/2 X 28 (AC61)
FN Five-seveN 1/2 X 28 (AC77)
S&W M&P 22 COMPACT 1/2 X 28 (AC875)
1/2 X 28 TO 1/2 X 28 O-RING ENGAGEMENT ADAPTER (AC115)
1/2 X 20 TO 1/2 X 28 (AC115)

by Armando R., Gear Expert, December 5, 2019
Customer Reviews
Helpful Positive Review
Fits Griffin Armament Optimus by Timothy, Verified Owner, March 11, 2017
Fits a little looser than sick flash hider but as soon as it hits the retention tab everything tightens up. I don't think this will be an issue though. The actual product looks different from the pic optics plant has. There is a taper for the retent...
Read More...
1/1 found this helpful
Read 1 Review
Show In Stock Only
3 Models Available
Caliber
All
Search
Click to select this item for your bundle offer!

Buy Together and Save

As low as $46.94
You Save Up to 13%
OP Bucks$1.00

Product Info for SilencerCo Delta Adapter

Replace your spring retainer, spring and piston for this fixed thread mount. It allows the use of the Octane 9 and Octane 45 on a fixed barrel firearm with thread sizes 1/2 X 28, 1/2 X 36, and 5/8 X 24. Made with stainless steel and given a black oxide finish.image

Specifications for SilencerCo Delta Adapter:

Manufacturer: SilencerCo
Fabric/Material: Steel
Color: Stainless
Threads per Inch: 1/2x28
Condition: New

Package Contents:

  • SilencerCo Rimfire Suppressor Adapter

SilencerCo Delta Adapter Orderable Models

List of Orderable Models

  • SilencerCo Rimfire Supressor Adapter, 5.7x28 FN, Black, AC77 , MPN: AC77 , UPC: 817272010046 , Code: 1UL-MD1-FLP-AC77
  • SilencerCo Rimfire Supressor Adapter, Smith & Wesson M&P 22, Black, AC875 , MPN: AC875 , UPC: 817272012163 , Code: 1UL-MD1-FLP-AC875
  • SilencerCo Rimfire Supressor Adapter, 1/2x28, Walther P22, Stainless, AC5 , MPN: AC5 , UPC: 817272010107 , Code: 1UL-MD1-FLP-AC5

SilencerCo Delta Adapter Unavailable & Discontinued Models

List of Unorderable Models

  • SilencerCo Rimfire Supressor Adapter, 1/2x28, Sig Mosquito, Stainless, AC4 , MPN: AC4 , UPC: 817272010022 , Code: 1UL-MD1-FLP-SRIMA8-AC4
  • SilencerCo Rimfire Supressor Adapter, GSG 1911, 22LR, Stainless, AC61 , MPN: AC61 , UPC: 817272010114 , Code: 1UL-MD1-FLP-SRIMA8-AC61
  • SilencerCo Octane Adapter For CZ Scorpion , MPN: AC1348 , UPC: 817272015317 , Code: 1UL-MD1-FLP-AC1348
Compare (0)