Advantage Arms Inc Glock 20/21 22 LR Conversion Kit

Advantage Arms Inc Glock 20/21 22 LR Conversion Kit
$299.99

Temporarily Out of Stock

Product Description

The Advantage Arms Glock conversion kit is designed to allow you to use a cheaper alternative to expensive centerfire ammo specifically for your Glock's chambered in 10mm auto and .45 ACP. This is a drop on conversion kit that requires no permanent modification to your firearm.

  • Advantage Arms Glock conversion kit AACLE20-21
  • .22 Long Rifle conversion kit
  • 4.6" barrel length
  • Slide assembly
  • Magazine
  • Black

Product Specifications

  • Generation 1/2/3 - Glock 20/20SF/21/21SF
  • This conversion kit will not fit Generation 4 Glock. A separate conversion kit for the Generation 4 Glock is available
  • CCI MiniMag 40 grain Round Nose, Remington Golden Bullets, and CCI Blazer are the recommended ammo for this conversion kit.
  • Hollow points, Winchester ammo, Federal ammo (other than AutoMatch), Remington Thunderbolts, CCI Stinger, or any other hyper velocity ammo is not recommended.

Customer Comments & Questions

Customer Reviews

(2 out of 5) Mediocre reliability, even worse customer service.
by Will from Mazeppa, MN on September 1, 2026

I purchased 2 Advantage Arms AA conversion kits, an original years ago and recently an MOD kit for the “optics ready” capability. I bought the AA MOD kit because it’s the only optics-ready Glock training option I could find, or I probably would not have purchased a second kit due to poor reliability. My older kit has many thousands of rounds through it; my new one has about 300 so far. Both are ammo finicky. Even with expensive Mini-Mags, reliability is just ok, but when it’s dirty, reliability is really bad! My only purpose for these kits is a Glock trainer, so the consistent failure-to-fire or feed issues provides more than enough tap-and-rack practice; I don’t recommend AA kits for a fun plinker; pistols like the M&P 22 Compact are crazy reliable with cheap ammo.

HERE’S THE BIG PROBLEM: My customer service experience with AA was unacceptable. The MOD kit is not optics ready, it needs an MOS plate that isn’t included. The kit doesn’t include extra mounting screws and doesn’t tell you the screw thread size on the slide. When I emailed AA for the thread size, I made the mistake of writing, “For the cost of an entire pistol, you’d think a plate, extra screws, and directions would be included.” The reply I got was rude, mocking me about knowing the price, and they refused to tell me the thread size. I can’t imagine what it would be like getting help with warranty work. I will never purchase another AA product; I expect a company to provide some basic customer service. I’ve needed real help with repair work with a Ruger and Smith & Wesson pistols in the past, and both had amazing customer service.