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Old 01-02-2020, 04:58 PM
mbsigman1 mbsigman1 is offline
Join Date: Jun 2003
Location: fort worth, tx
Age: 64
Posts: 651
Hex-Tac 2011 .45 recoil springs

Hi folks. I tried to call STI early today re the following questions, kept getting cut off. I then sent the following email and have not received a response, so I figured I'd post it here to see if anyone is familiar with this setup and might have answers.

"Hello. Just purchased a new-in-box HexTac 2011 4.0 in .45acp. Came with what looks to be a RecoilMaster recoil spring system - it's an assembly with a smaller inner spring and a larger outer spring. BOTH springs are painted yellow. Have not shot the weapon yet. Some questions:

How often should I replace the recoil spring?

Which spring should I use?

Dawson told me to use their SKU 519-1553 and to ONLY change the outer large recoil spring and to never attempt to disassemble the RecoilMaster unit to get to the inner spring - is this a true statement?

If I wanted to switch to a Wolff recoil spring, which spring should I use for this application?"

Anyone out there have experience with this gun/caliber and have answers?


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Old 01-02-2020, 05:47 PM
Descartian Descartian is offline
Join Date: Sep 2016
Posts: 1,845
The mainspring on the recoilmaster is rated for 5000 rounds, I have guns with 7k+ and still shooting well. I canít remember the round count to replace the smaller spring but itís a huge number.
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Old 01-08-2020, 12:09 AM
mbsigman1 mbsigman1 is offline
Join Date: Jun 2003
Location: fort worth, tx
Age: 64
Posts: 651
Heard from an STI rep, and sorry for the delay in responding to this thread - I've been working my butt off lately.

The rep agreed with everything Mr Descartian said. 5K rounds for recoil spring swap, use ONLY the heavy springs from Dawson for the .45, don't even think about disassembling the recoilmaster system, and Wolff springs won't work in this particular application.

Submitted in case this might help someone else.

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