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#5950800 - 09/28/15 02:24 PM Glock 21 AAC TiRant
Just Nate Offline
Extreme Tracker

Registered: 01/14/12
Posts: 4453
Loc: Austin, TX
I have a Glock 21 45 ACP with Factory Threaded Barrel, Factory Suppressor Sights and Factory Springs. I took it to the range to shoot my new AAC TiRant. I was shooting 230 gr Winchester White Box. The gun never went back into battery once after firing. The gun would cycle and almost go into battery. All I had to do was push a little on the back dust cover. What spring weight should I change the Factory Springs to such that the rounds will cycle?

#5950963 - 09/28/15 03:54 PM Re: Glock 21 AAC TiRant [Re: Just Nate]
BCJ Offline
Pro Tracker

Registered: 06/01/05
Posts: 1969
Loc: Frisco
Was the Tirant piston lubed when you were shooting? I'd check that or try various ammo before changing out the recoil spring.
My G17 with Trident would do what yours is doing if it didn't lube the LID piston

#5951112 - 09/28/15 05:15 PM Re: Glock 21 AAC TiRant [Re: Just Nate]
tannerlst Offline

Registered: 01/31/09
Posts: 5131
Loc: Dallas
My g21sf runs perfect with factory parts and a Ti-rant .45 . I've heard of people having issues but mine runs like a champ ...


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