Anybody ever heard of these?
Anybody ever dealt with the seller?
ADVANCED TECHNOLOGY BRAND
Increase mag capacity to 7 rounds
Made of virtually indestructible, glass-filled nylon
injection-molded over a stell connecting nut
Will not rust or dent
New spring and instructions
Minimum barrel length for 7 shot extension is 18-1/5"
Easy to install - no gunsmithing
Made in the USA
LIFETIME WARRANTY !!!
* 7 rd. MAG EXTENSION NEEDS 18-1/5" BARREL LENGTH