This model was our origianal model so it's versitility keeps it as a #1 seller. Athough designed to help with wider high cap magazines, there is also a groove inside the mag well, front and rear, to align a 1911 style magazine. Years later and more innovations came along we expanded to a complete line as we offer now. If it is not and ADCO, it's not a Super Thumb. The one that guaranteed not to break.
ST1 21.5mm x 32.5mm • 1-1/4” x 13/16”
Most Double-Stack Magazines
Astra - A80, A90
Beretta - Cougar 8000, 8040,APX, PX4, 92, 96
Bersa Ultra Compact Pro 9, 40, 45, TPR9C
Browning - High Power
CZ 75, 97B
Colt - 2000 and all 1911 equivalents
FNP FNS - 9mm, 509 TAC
Glock 43, 48 (also Mossberg MC1SC)
HK - USP9
IMI - Baby Eagle
IWI - Jericho
Keltec - 9mm & 40
Star - 28, 30, 31
S&W - 59, Sigma, M&P 9mm & 40
Sig - 226, 228, 229, 250, 320, 365 SP2022
SCCY - 9mm
Springfield -XDE, XDS, XDM, XD40
Steyr - Mod. M, Mod. 9
Taurus - PT92, 111, 917, G2C, G3
Rock Island MS
Ruger - SR9/P85/89/93/94/95/PC9
Walther - P99
Returns Policy
- We are unable to accept returns on ammunition. All ammunition sales are final.
- It is up to the customer to know all local laws and obey them. By purchasing ammunition or magazines you certify that you are 21 years of age.
Delivery Date and Manually Reviewed Orders
- We offer the estimated delivery date at checkout for UPS and Fedex shipping. This is an estimate based on the current warehouse workflow and the shipping carrier's transit time.
- If your order requires manual review the shipping date may be delayed. Orders that need to be manually verified are flagged by our system. Typically we flag orders for manual verification if the billing and shipping address do not match, we need an ID on file to ship the order, or if the order is from a first time customer for a large amount. We will contact you promptly to verify your order or request an ID. To expedite this process feel free to contact us in advance to verify the order or submit your ID. Please submit the ID using the tools on the site to upload your ID. This info is displayed below under your corresponding state. Once you have been verified you will be put on a white list for future orders. We thank you for your help.
Shipping Restrictions
Alaska | No ammunition |
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California |
Must be shipped to an FFL or Licensed Ammunition Vendor unless you are an exempt peace officer. IF you have an FFL03 we can ship ammunition to you once on file, but you must have an AVL issued by CA to transfer ammunition. Click here to view the FFL dealers we have on file and instructions for shipping to a CA FFL or AVL. Click here to upload your FFL or AVL information (LEO Credentials if applicable) No tracer ammunition No magazines over 10 rounds |
Connecticut |
No magazines over 10 rounds |
Colorado | No magazines over 15 rounds |
DC | No ammunition, no magazines over 10 rounds |
Hawaii | No Ammunition, no magazines over 10 rounds, no Starter Pistols |
Illinois | Must have an Illinois Firearms Owner Identification Card, no shipments to Chicago. Click here to upload your IL Firearms Owner ID Card |
Maryland | No magazines over 10 rounds |
Massachusetts | No Ammunition, no magazines over 10 rounds, no Starter Pistols |
New Jersey | No magazines over 10 rounds, must have a New Jersey Firearms Purchaser Identification Card to purchase ammunition Click here to upload your NJ Firearms Purchaser ID Card |
New York | No magazines over 10 rounds |
New York City | No magazines over 10 rounds, all ammunition must be shipped to an FFL Click here to upload an FFL |