Easy to install and it worked flawlessly!
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Product reviews
Specs of The AR-TT
Armaspec · SRS GEN4 · 9mm · 6.4oz · Silent Recoil Spring · USA Made · Lifetime Warranty
The Armaspec Stealth Recoil Spring SRS GEN4 9mm is a self-contained multi-stage drop-in replacement for your standard buffer and spring in AR-9 and PCC platforms. The spring is engineered to never contact the inner wall of the buffer tube — silent operation, reduced felt recoil, and consistent spring tension through high round counts. One unit drops in where your buffer and spring used to be.
At 6.4oz equivalent weight the SRS-9 is the right mass for 9mm FRT builds, PCC active reset setups, and any 9mm platform where cycle control and consistency matter.
⚠ 9mm Bolt Carrier Note — Read Before Installing
For proper function of the SRS-9 in your 9mm rifle or pistol, the extra weight on the back of the 9mm bolt carrier must be removed prior to installation. It is held in with a spring pin and can be removed with a punch. This step is required — failure to remove it will prevent the SRS-9 from functioning correctly. Standard 9mm bolt carriers without this extra weight require no modification.
FRT & PCC Active Reset Builds
The SRS GEN4 9mm at 6.4oz equivalent weight provides the mass needed for reliable forced reset trigger and active reset function in 9mm AR-9 and PCC builds. The silent captured system maintains consistent spring tension through high-cyclic-rate fire, improving FRT reset timing consistency over long strings. Compatible with the Kabuto FRT Metal Ambi Selector in PCC configurations.
How It Works
The SRS is a multi-stage system — the spring rides on an internal rod and never contacts the buffer tube wall. The buffer mass stays under constant tension against the bolt carrier throughout the cycling stroke. The second stage activates at the rear of travel, reducing felt recoil impulse. The whole system drops in as one unit.
Features
- Silent operation — spring never contacts inner wall of buffer tube. Eliminates the spring-scrape noise on every cycling stroke
- Multi-stage recoil reduction — second stage activates at rear of travel, significantly reducing felt recoil impulse
- Buffer mass under constant tension — stays in contact with the bolt carrier throughout the cycling stroke for consistent timing
- Drop-in installation — replaces your standard buffer and spring as one self-contained unit. No gunsmithing, no modification to the buffer tube
- 6.4oz equivalent weight — purpose-built mass for 9mm AR-9 and PCC platforms
- GEN4 improvements — roll pin replaces screw on end piece, machined cap replaces snap ring, no O-ring on weight. Fewer potential failure points than previous generations
- Lifetime warranty
- 100% USA made
Specs
| System Type | Multi-stage drop-in — buffer and spring self-contained |
| Equivalent Weight | 6.4oz (9MM) |
| Actual Weight (Complete) | 9.5oz |
| Length | 7.18" |
| Platform | AR-9, PCC — carbine-length buffer tube |
| 9mm BCG Requirement | Remove extra weight from rear of bolt carrier — held with spring pin |
| Buffer Retainer | Compatible with or without — most users run without for easy maintenance |
| GEN4 Changes | Roll pin end piece, machined cap, no O-ring on weight |
| Warranty | Lifetime |
| SKU | ARM253-9MM |
| Country of Origin | 100% USA Made |
Installation
- 9mm bolt carrier prep — if your bolt carrier has an extra weight on the rear, remove it using a punch to drive out the spring pin before installing the SRS-9
- Insert the polymer bumper end (rear) toward the back of the buffer tube
- Insert the metal weight mass end toward the bolt carrier
- Function check — cycle the action to verify smooth operation
Can be installed with or without the buffer retainer. Most shooters run without for ease of maintenance.
Frequently Asked Questions
What is the Armaspec SRS GEN4 9mm?
A self-contained multi-stage drop-in replacement for your standard buffer and spring in 9mm AR-9 and PCC platforms. The spring never contacts the inner wall of the buffer tube — silent operation and reduced felt recoil. Drops in as one unit where your existing buffer and spring were.
Does this require modification to my 9mm bolt carrier?
Yes — if your 9mm bolt carrier has an extra weight on the rear, it must be removed before installing the SRS-9. It is held in with a spring pin and can be removed with a punch. This is required for proper function. Standard 9mm bolt carriers without this extra weight require no modification.
What platforms does this fit?
AR-9 and PCC platforms with carbine-length buffer tubes. For standard AR-15 .223/5.56 builds, see the Armaspec SMB Gen3 H2 or H3 listings. For AR-10 .308 builds, see the Armaspec SRS GEN4 AR-10.
Is this good for FRT builds?
Yes. At 6.4oz equivalent weight the SRS-9 provides the mass needed for reliable FRT and active reset trigger function in PCC and AR-9 builds. The consistent spring tension from the captured system also improves FRT reset timing consistency through rapid fire strings.
Is the SRS made in the USA?
Yes. 100% USA made, backed by a lifetime warranty.
Related Products & Resources
- Armaspec SRS GEN4 AR-10 — .308 / 6.5 Creedmoor ($69.99)
- Armaspec SMB Gen3 H3 — AR-15 FRT Buffer ($59.99)
- Armaspec SMB Gen3 H2 — AR-15 FRT Buffer ($59.99)
- Kabuto FRT — Metal Ambi Selector | PCC Compatible ($129.99)
- All AR-15 Buffers for FRT Builds
- Best Buffer for FRT Trigger AR-15 Builds
- Best FRT Triggers for AR-15 — 2026 Buyer's Guide
- Are FRT Triggers Legal? — State-by-State Guide
Install by a qualified individual familiar with the AR-9 and PCC platform. Always remove extra bolt carrier weight on 9mm carriers before installing SRS-9. It is the buyer's responsibility to comply with all applicable local, state, and federal laws. Armaspec SRS GEN4 is USA made and backed by a lifetime warranty.
The AR-Takedown Tool (AR-TT)
- weight is only 58 grams, under 3oz
-Length: 6 5/16"
-Diameter 1/2"
-This is the ONLY USA made gun smithing tool, gun cleaning tool, building tool, disable tool on the market.
Customer Reviews
Overall rating: 4.4 / 5 from 1805 reviews.
I ordered this thinking I would beat the next stupid ban. So the trigger arrived very fast, just a few days, and I didn't pay for the extra shipping charge for getting it faster. Wasn't needed in my case. This was so easy to install a blind person could do it. Then I took it to the range and I expected it not to work like it was described. OMG did my face light up! Burned up two magazines in less than 10 seconds I think. And is still safe, and it retains the semi auto, or one shot per pull capability. I'm buying more for my other AR's now.
Second one i bought now and still flawless operation. Would recommend this product to anyone who likes to go through ammo.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Store owner replied: Hey, We are absolutely thrilled to hear that your second Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made) is delivering flawless operation! It's fantastic to know you're enjoying the product so much that you've come back for another, and your recommendation truly means the world to us. Our aim is always to provide high-quality gear that enhances your experience, especially for those who appreciate consistent performance. Thanks again for your incredible support and we look forward to serving your needs in the future!
It went great. Easy to install and it worked with all my stock parts.
100% USA Made Super Safety with Flat Trigger – On Sale $94.99
Store owner replied: Hey, We're thrilled to hear that your 100% USA Made Super Safety with Flat Trigger went great! It's fantastic to know that the installation was easy and that it worked seamlessly with all your stock parts. Your positive experience is exactly what we aim for at The Takedown Tools. Your feedback highlights our dedication to providing top-quality, compatible accessories for our valued customers. Thanks again for your wonderful review and for being a part of The Takedown Tools family. We hope to see you back for your next upgrade!
It wasn't exactly what I was expecting but I gave it a try. The installation video sucks because I couldn't see what he was doing but I ended up getting it. You have to learn how to run it as there's a little bit of a trick to it but once you do that it's fun to use.
Easy install, no problems.
Partisan Disruptor FRT (Black) + M16 BCG + H3 Buffer Bundle — AR-15 (USA Made)
This thing is more fun than a bucket of puppies
First time using the Disruptor drop-in trigger I couldn't get it to work, even after swapping in an H2 buffer. This H3 heavy-duty spring combo finally did the trick. Rifle is an older S&W Sport II. Suppressor is SilencerCo Velos 556. Very happy with the result and looking forward to adding Disruptor FRT and this buffer/spring to at least two more rifles.
Odin Works HFRT — All-In-One Buffer & Buffer Tube System for FRTs and Super Safeties
Store owner replied: Glad you loved it! Suppressed can be a fickle one too at times
Super easily installation. Works flawlessly, not one hiccup out of the few hundred rounds I’ve gone through so far.
Awesome and easy to install! I have a PSA 300blk and didn’t even need to change buffer weight to make it run great.
Hoffman Tactical Super Safety AR-15 100% USA Made
Store owner replied: Thrilled you love your product
I usually wear proper shoes and stand correctly but the urge hit me n I headed out the door lol, amazingly reliable and a blast to shoot
Third one from AR Takedown!!! This one is in a CMMG Banshee 45ACP
AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety
Had some initial issues with the trigger but customer service was easy to get ahold of and took care of me. Shipping was super fast, and everything is working as intended now. I wouldn’t think twice about ordering from them again.
100% USA Made Super Safety with Flat Trigger – On Sale $89.99
Install was fairly straight forward, no clear directions on instalation but easy to figure it all out. Function test went well.
AK-47 FRT Super Safety – 100% USA Made
Store owner replied: Hey Joel, This is GREAT to hear, and glad it was super easy
The FRT dropped right in and ran wonderfully! It cycled 22 rounds in roughly 2 seconds. My son's first experience firing anything like this and he absolutely loved it. I highly recommend this product for your TX22.
Easy to install, absolutely fun! Everyone that shoots it instantly start looking to buy one.
Best trigger on the market by far.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Sorry folks you will never find the 45 cal SMG out in the wild. Runs great with the Partisan Disruptor
2 pack combo Partisan Forced-Reset Drop-In Cassette Trigger FRT – AR-15 Platform (USA-Made)
Super easy to install works perfectly. I put this one in a ar9mm lower . I kinda like the push button now very smooth
Trigger Supply: Hoffman Tactical Super Safety – S7 Tool Steel – Flat Trigger | AR-15 USA Made
Safe, Semi, FRT. Until you experience it, you just don’t know what it’s like. But once you do know, you’ll want more. An addiction that is backed by the Constitution. 2A for LIFE.
Works perfect
Worked amazingly. Was everything I hoped it would be. Would definitely recommend these guys to anyone looking to purchase firearms accessories. Had a couple small order issues in the past and they were handled very quickly and expertly. As a result I try to give them as much of my business as possible.
Super easy to install, runs smooth and without failure in a completely stock $500 American tactical AR, there are plenty of videos showing how to install it. Would and am buying this trigger kit again, and pairing it with a lighter spring kit, there isn’t any weird quirks with it, I simply installed it with some oil and my factory pins and springs and it worked without polishing or any other modifications. Super happy with it!
AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety
Store owner replied: Hey, We are absolutely thrilled to hear that you found the AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety super easy to install and that it's running smoothly in your stock American Tactical AR! It's fantastic to know you appreciate the straightforward installation process and the reliable performance without any modifications needed. We truly value your feedback, especially hearing that you're so happy with your purchase. Your positive experience truly motivates us, and we are always striving to provide exceptional products that meet your needs seamlessly. Thanks again for your support, and we look forward to serving you with your next trigger kit and lighter spring setup.
Straight drop in, no modifications. Ran great no issues yet
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
All the literature online made it extremely easy to install. In my opinion this is the best one.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Store owner replied: Hey GLAD YOU LOVE IT!
Functioned fantastically. I absolutely recommend a heavier buffer. I have a Ruger AR lower and it fit perfectly. Really really enjoys the metal mags. Had loading issues, disappeared when I swapped to metal mags. Selector switch works slightly better than original. I used a extra spring I had laying around and got an H3 buffer. Make sure you have the full auto BCG or this product will not function.
Partisan Forced-Reset Drop-In Cassette Trigger (Black) FRT – AR-15 Platform (USA-Made)
I ended up needing something slightly lighter to run the G Lever FRS, but the H2.5 is probably a good option for a suppressed build with more back pressure
Had to do a minor tweak to tappet wire but other than that it was a drop in kit. Seems to be made of quality steel. We all are now having great fun with it.
Trigger worked perfect. Only thing I had to do was get a h3 buffer (heavy) tube and it was flawless. Dumped 2 mags in a matter of seconds.
Works flawless when you have a h3 buffer and im going to buy 5 more 😆 🤣
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Works great!
Love it!!!!, Works great!!!
Odin Works HFRT — All-In-One Buffer & Buffer Tube System for FRTs and Super Safeties
My first ARC-Fire ran like a champ! I never had a hiccup or problem, and everyone on the range stared like I was a criminal...🤣 It was the V1, and man I was happy. Then all of a sudden... I watched a video that showcased the ARC-Fire V2, with a 0-45°-90° ambi selector, and I had to have one. After all, it was going in my HK MR556 A4, and it has the markings on the lower for a 0°-45° selector, and I, of course, wanted it to match. So I bought one... While visiting AS Designs website, I noticed they sold HK style selector levers for their ARC-Fire V2. So I bought some... You CANNOT go wrong with this company! Their products are, in my and many others opinion, the best FRT on the market today! Just go to YouTube and pull up a 'Juicy Media' video, and he demonstrates a bunch of different brands of FRT and explains the pros/cons of the others, and explains why he prefers AS Designs! 5 MF'ing ☆'s~!!!
Works great with a h3 buffer, didn’t jam once
Simple to install, and fun to shoot
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Extra fast shipping, and price was below average market cost. Easy installation. I would recommend this FRT to anyone looking.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Super easy install. Fast shipping
AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety
This enhanced semi-auto trigger is amazing the install was easy the function is great the only thing would be you need a t10 tool of your own to hold the other side. But overall 10/10 this mad my cheap Anderson ar turn heads!!!
Partisan Forced-Reset Drop-In Cassette Trigger (Black) FRT – AR-15 Platform (USA-Made)
Crazy fun and runs like butter
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)